MyRocks System Variables

This page documents system variables related to the MyRocks storage engine. See Server System Variables for a complete list of system variables and instructions on setting them.

See also the Full list of MariaDB options, system and status variables.

rocksdb_access_hint_on_compaction_start

• Description: DBOptions::access_hint_on_compaction_start for RocksDB. Specifies the file access pattern, applied to all input files, once a compaction starts.
• Commandline: --rocksdb-access-hint-on-compaction-start=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 1
• Range: 0 to 3

---

rocksdb_advise_random_on_open

• Description: DBOptions::advise_random_on_open for RocksDB.
• Commandline: --rocksdb-advise-random-on-open={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON

---

rocksdb_allow_concurrent_memtable_write

• Description: DBOptions::allow_concurrent_memtable_write for RocksDB.
• Commandline: --rocksdb-allow-concurrent-memtable-write={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_allow_mmap_reads

• Description: DBOptions::allow_mmap_reads for RocksDB
• Commandline: --rocksdb-allow-mmap-reads={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_allow_mmap_writes

• Description: DBOptions::allow_mmap_writes for RocksDB
• Commandline: --rocksdb-allow-mmap-writes={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_allow_to_start_after_corruption

• Description: Allow server still to start successfully even if RocksDB corruption is detected.
• Commandline: --rocksdb-allow-to-start-after-corruption={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF
• Introduced: MariaDB 10.3.7, MariaDB 10.2.15

---

rocksdb_background_sync

• Description: Turns on background syncs for RocksDB
• Commandline: --rocksdb-background-sync={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF
• Removed: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_base_background_compactions

• Description: DBOptions::base_background_compactions for RocksDB
• Commandline: --rocksdb-base-background-compactions=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 1
• Range: -1 to 64
• Removed: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_blind_delete_primary_key

• Description: Deleting rows by primary key lookup, without reading rows (Blind Deletes). Blind delete is disabled if the table has secondary key.
• Commandline: --rocksdb-blind-delete-primary-key={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_block_cache_size

• Description: Block_cache size for RocksDB (block size 1024)
• Commandline: --rocksdb-block-cache-size=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 536870912
• Range: 1024 to 9223372036854775807

To see the statistics of block cache usage, check SHOW ENGINE ROCKSDB STATUS output (search for lines starting with rocksdb.block.cache).

One can check the size of data of the block cache in DB_BLOCK_CACHE_USAGE column of the INFORMATION_SCHEMA.ROCKSDB_DBSTATS table.

---

rocksdb_block_restart_interval

• Description: BlockBasedTableOptions::block_restart_interval for RocksDB
• Commandline: --rocksdb-block-restart-interval=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 16
• Range: 1 to 2147483647

---

rocksdb_block_size

• Description: BlockBasedTableOptions::block_size for RocksDB
• Commandline: --rocksdb-block-size=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 4096
• Range: 1 to 18446744073709551615

---

rocksdb_block_size_deviation

• Description: BlockBasedTableOptions::block_size_deviation for RocksDB
• Commandline: --rocksdb-block-size-deviation=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 10
• Range: 0 to 2147483647

---

rocksdb_bulk_load

• Description: Use bulk-load mode for inserts. This disables unique_checks and enables rocksdb_commit_in_the_middle.
• Commandline: --rocksdb-bulk-load={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_bulk_load_allow_sk

• Description: Allow bulk loading of sk keys during bulk-load. Can be changed only when bulk load is disabled.
• Commandline: --rocksdb-bulk-load_allow_sk={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF
• Introduced: MariaDB 10.3.10, MariaDB 10.2.18

---

rocksdb_bulk_load_allow_unsorted

• Description: Allow unsorted input during bulk-load. Can be changed only when bulk load is disabled.
• Commandline: --rocksdb-bulk-load_allow_unsorted={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_bulk_load_size

• Description: Maximum number of records in a batch for bulk-load mode.
• Commandline: --rocksdb-bulk-load-size=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 1000
• Range: 1 to 1073741824

---

rocksdb_bytes_per_sync

• Description: DBOptions::bytes_per_sync for RocksDB.
• Commandline: --rocksdb-bytes-per-sync=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 18446744073709551615

---

rocksdb_cache_dump

• Description: Include RocksDB block cache content in core dump.
• Commandline: --rocksdb-cache-dump={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: ON
• Introduced: MariaDB 10.4.7, MariaDB 10.3.17, MariaDB 10.2.26

---

rocksdb_cache_high_pri_pool_ratio

• Description: Specify the size of block cache high-pri pool.
• Commandline: --rocksdb-cache-high-pri-pool-ratio=#
• Scope: Global
• Dynamic: Yes
• Data Type: double
• Default Value: 0.000000
• Range: 0 to 1
• Introduced: MariaDB 10.4.7, MariaDB 10.3.17, MariaDB 10.2.26

---

rocksdb_cache_index_and_filter_blocks

• Description: BlockBasedTableOptions::cache_index_and_filter_blocks for RocksDB.
• Commandline: --rocksdb-cache-index-and-filter-blocks={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON

---

rocksdb_cache_index_and_filter_with_high_priority

• Description: cache_index_and_filter_blocks_with_high_priority for RocksDB.
• Commandline: --rocksdb-cache-index-and-filter-with-high-priority={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON
• Introduced: MariaDB 10.4.7, MariaDB 10.3.17, MariaDB 10.2.26

---

rocksdb_checksums_pct

• Description: Percentage of rows to be checksummed.
• Commandline: --rocksdb-checksums-pct=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 100
• Range: 0 to 100

---

rocksdb_collect_sst_properties

• Description: Enables collecting SST file properties on each flush.
• Commandline: --rocksdb-collect-sst-properties={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON

---

rocksdb_commit_in_the_middle

• Description: Commit rows implicitly every rocksdb_bulk_load_size, on bulk load/insert, update and delete.
• Commandline: --rocksdb-commit-in-the-middle={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_commit_time_batch_for_recovery

• Description: TransactionOptions::commit_time_batch_for_recovery for RocksDB.
• Commandline: --rocksdb-commit-time-batch-for-recovery={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF
• Introduced: MariaDB 10.3.10, MariaDB 10.2.18

---

rocksdb_compact_cf

• Description: Compact column family.
• Commandline: --rocksdb-compact-cf=value
• Scope: Global
• Dynamic: Yes
• Data Type: string
• Default Value: (Empty)

---

rocksdb_compaction_readahead_size

• Description: DBOptions::compaction_readahead_size for RocksDB.
• Commandline: --rocksdb-compaction-readahead-size=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 18446744073709551615

---

rocksdb_compaction_sequential_deletes

• Description: RocksDB will trigger compaction for the file if it has more than this number sequential deletes per window.
• Commandline: --rocksdb-compaction-sequential-deletes=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 2000000

---

rocksdb_compaction_sequential_deletes_count_sd

• Description: Counting SingleDelete as rocksdb_compaction_sequential_deletes.
• Commandline: --rocksdb-compaction-sequential-deletes-count-sd={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_compaction_sequential_deletes_file_size

• Description: Minimum file size required for compaction_sequential_deletes.
• Commandline: --rocksdb-compaction-sequential-deletes-file-size=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: -1 to 9223372036854775807

---

rocksdb_compaction_sequential_deletes_window

• Description: Size of the window for counting rocksdb_compaction_sequential_deletes.
• Commandline: --rocksdb-compaction-sequential-deletes-window=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 2000000

---

rocksdb_concurrent_prepare

• Description: DBOptions::concurrent_prepare for RocksDB.
• Commandline: --rocksdb-coconcurrent-prepare={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: 1
• Removed: MariaDB 10.3.7, MariaDB 10.2.15

---

rocksdb_create_checkpoint

• Description: Checkpoint directory.
• Commandline: --rocksdb-create-checkpoint=value
• Scope: Global
• Dynamic: Yes
• Data Type: string
• Default Value: (Empty)

---

rocksdb_create_if_missing

• Description: DBOptions::create_if_missing for RocksDB.
• Commandline: --rocksdb-create-if-missing={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON

---

rocksdb_create_missing_column_families

• Description: DBOptions::create_missing_column_families for RocksDB.
• Commandline: --rocksdb-create-missing-column-families={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_datadir

• Description: RocksDB data directory.
• Commandline: --rocksdb-datadir[=value]
• Scope: Global
• Dynamic: No
• Data Type: string
• Default Value: ./#rocksdb

---

rocksdb_db_write_buffer_size

• Description: DBOptions::db_write_buffer_size for RocksDB.
• Commandline: --rocksdb-db-write-buffer-size=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 0
• Range: 0 to 18446744073709551615

---

rocksdb_deadlock_detect

• Description: Enables deadlock detection.
• Commandline: --rocksdb-deadlock-detect={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_deadlock_detect_depth

• Description: Number of transactions deadlock detection will traverse through before assuming deadlock.
• Commandline: --rocksdb-deadlock-detect-depth=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 50
• Range: 2 to 18446744073709551615

---

rocksdb_debug_manual_compaction_delay

• Description: For debugging purposes only. Sleeping specified seconds for simulating long running compactions.
• Commandline: --rocksdb-debug_manual_compaction_delay=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 4294967295
• Introduced: MariaDB 10.3.10, MariaDB 10.2.18

---

rocksdb_debug_optimizer_no_zero_cardinality

• Description: If cardinality is zero, override it with some value.
• Commandline: --rocksdb-debug-optimizer-no-zero-cardinality={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: ON

---

rocksdb_debug_ttl_ignore_pk

• Description: For debugging purposes only. If true, compaction filtering will not occur on PK TTL data. This variable is a no-op in non-debug builds.
• Commandline: --rocksdb-debug-ttl-ignore-pk={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_debug_ttl_read_filter_ts

• Description: For debugging purposes only. Overrides the TTL read filtering time to time + debug_ttl_read_filter_ts. A value of 0 denotes that the variable is not set. This variable is a no-op in non-debug builds.
• Commandline: --rocksdb-debug-ttl-read-filter-ts=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: -3600 to 3600
• Introduced: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_debug_ttl_rec_ts

• Description: For debugging purposes only. Overrides the TTL of records to now() + debug_ttl_rec_ts. The value can be +/- to simulate a record inserted in the past vs a record inserted in the 'future'. A value of 0 denotes that the variable is not set. This variable is a no-op in non-debug builds.
• Commandline: --rocksdb-debug-ttl-read-filter-ts=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: -3600 to 3600
• Introduced: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_debug_ttl_snapshot_ts

• Description: For debugging purposes only. Sets the snapshot during compaction to now() + debug_set_ttl_snapshot_ts. The value can be positive or negative to simulate a snapshot in the past vs a snapshot created in the 'future'. A value of 0 denotes that the variable is not set. This variable is a no-op in non-debug builds.
• Commandline: --rocksdb-debug-ttl-snapshot-ts=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: -3600 to 3600
• Introduced: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_default_cf_options

• Description: Default cf options for RocksDB.
• Commandline: --rocksdb-default-cf-options=value
• Scope: Global
• Dynamic: No
• Data Type: string
• Default Value: (Empty)

---

rocksdb_delayed_write_rate

• Description: DBOptions::delayed_write_rate.
• Commandline: --rocksdb-delayed-write-rate=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0 (Previously 16777216)
• Range: 0 to 18446744073709551615

---

rocksdb_delete_cf

• Description: Delete column family.
• Commandline: --rocksdb-delete-cf=val
• Scope: Global
• Dynamic: No
• Data Type: string
• Default Value: (Empty string)
• Introduced: MariaDB 10.4.7, MariaDB 10.3.17, MariaDB 10.2.26

---

rocksdb_delete_obsolete_files_period_micros

• Description: DBOptions::delete_obsolete_files_period_micros for RocksDB.
• Commandline: --rocksdb-delete-obsolete-files-period-micros=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 21600000000
• Range: 0 to 9223372036854775807

---

rocksdb_enable_2pc

• Description: Enable two phase commit for MyRocks. When set, MyRocks will keep its data consistent with the binary log (in other words, the server will be a crash-safe master). The consistency is achieved by doing two-phase XA commit with the binary log.
• Commandline: --rocksdb-enable-2pc={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: ON

---

rocksdb_enable_bulk_load_api

• Description: Enables using SstFileWriter for bulk loading.
• Commandline: --rocksdb-enable-bulk-load-api={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON

---

rocksdb_enable_insert_with_update_caching

• Description: Whether to enable optimization where we cache the read from a failed insertion attempt in INSERT ON DUPLICATE KEY UPDATE.
• Commandline: --rocksdb-enable-insert-with-update-caching={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: ON
• Introduced: MariaDB 10.4.7, MariaDB 10.3.17, MariaDB 10.2.26

---

rocksdb_enable_thread_tracking

• Description: DBOptions::enable_thread_tracking for RocksDB.
• Commandline: --rocksdb-enable-thread-tracking={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_enable_ttl

• Description: Enable expired TTL records to be dropped during compaction.
• Commandline: --rocksdb-enable-ttl={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: ON
• Introduced: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_enable_ttl_read_filtering

• Description: For tables with TTL, expired records are skipped/filtered out during processing and in query results. Disabling this will allow these records to be seen, but as a result rows may disappear in the middle of transactions as they are dropped during compaction. Use with caution.
• Commandline: --rocksdb-enable-ttl-read-filtering={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: ON
• Introduced: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_enable_write_thread_adaptive_yield

• Description: DBOptions::enable_write_thread_adaptive_yield for RocksDB.
• Commandline: --rocksdb-enable-write-thread-adaptive-yield={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_error_if_exists

• Description: DBOptions::error_if_exists for RocksDBB.
• Commandline: --rocksdb-error-if-exists={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_error_on_suboptimal_collation

• Description: Raise an error instead of warning if a sub-optimal collation is used.
• Commandline: --rocksdb-error-on-suboptimal-collation={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON
• Introduced: MariaDB 10.3.10, MariaDB 10.2.18

---

rocksdb_flush_log_at_trx_commit

• Description: Sync on transaction commit. Similar to innodb_flush_log_at_trx_commit. One can check the flushing by examining the rocksdb_wal_synced and rocksdb_wal_bytes status variables.
  • 1: Always sync on commit (the default).
  • 0: Never sync.
  • 2: Sync based on a timer controlled via rocksdb-background-sync.
• Commandline: --rocksdb-flush-log-at-trx-commit=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 1
• Range: 0 to 2

---

rocksdb_flush_memtable_on_analyze

• Description: Forces memtable flush on ANALZYE table to get accurate cardinality.
• Commandline: --rocksdb-flush-memtable-on-analyze={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: ON
• Removed: MariaDB 10.3.7, MariaDB 10.2.15

---

rocksdb_force_compute_memtable_stats

• Description: Force to always compute memtable stats.
• Commandline: --rocksdb-force-compute-memtable-stats={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: ON

---

rocksdb_force_compute_memtable_stats_cachetime

• Description: Time in usecs to cache memtable estimates.
• Commandline: --rocksdb-force-compute-memtable-stats-cachetime=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 60000000
• Range: 0 to 2147483647

---

rocksdb_force_flush_memtable_and_lzero_now

• Description: Acts similar to force_flush_memtable_now, but also compacts all L0 files.
• Commandline: --rocksdb-force-flush-memtable-and-lzero-now={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF
• Introduced: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_force_flush_memtable_now

• Description: Forces memstore flush which may block all write requests so be careful.
• Commandline: --rocksdb-force-flush-memtable-now={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_force_index_records_in_range

• Description: Used to override the result of records_in_range() when FORCE INDEX is used.
• Commandline: --rocksdb-force-index-records-in-range=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 2147483647

---

rocksdb_git_hash

• Description: Git revision of the RocksDB library used by MyRocks.
• Commandline: --rocksdb-git-hash=value=#
• Scope: Global
• Dynamic: No
• Data Type: string
• Default Value: As per git revision.

---

rocksdb_hash_index_allow_collision

• Description: BlockBasedTableOptions::hash_index_allow_collision for RocksDB.
• Commandline: --rocksdb-hash-index-allow-collision={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON

---

rocksdb_ignore_unknown_options

• Description: Enable ignoring unknown options passed to RocksDB.
• Commandline: --rocksdb-ignore-unknown-options={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON
• Introduced: MariaDB 10.3.7, MariaDB 10.2.15

---

rocksdb_index_type

• Description: BlockBasedTableOptions::index_type for RocksDB.
• Commandline: --rocksdb-index-type=value
• Scope: Global
• Dynamic: No
• Data Type: enum
• Default Value: kBinarySearch
• Valid Values: kBinarySearch, kHashSearch

---

rocksdb_info_log_level

• Description: Filter level for info logs to be written mysqld error log. Valid values include 'debug_level', 'info_level', 'warn_level', 'error_level' and 'fatal_level'.
• Commandline: --rocksdb-info-log-level=value
• Scope: Global
• Dynamic: Yes
• Data Type: enum
• Default Value: error_level
• Valid Values: error_level, debug_level, info_level, warn_level, fatal_level

---

rocksdb_io_write_timeout

• Description: Timeout for experimental I/O watchdog.
• Commandline: --rocksdb-io-write-timeout=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Valid Values: 0 to 4294967295
• Introduced: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_is_fd_close_on_exec

• Description: DBOptions::is_fd_close_on_exec for RocksDB.
• Commandline: --rocksdb-is-fd-close-on-exec={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON

---

rocksdb_keep_log_file_num

• Description: DBOptions::keep_log_file_num for RocksDB.
• Commandline: --rocksdb-keep-log-file-num=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 1000
• Range: 0 to 18446744073709551615

---

rocksdb_large_prefix

• Description: Support large index prefix length of 3072 bytes. If off, the maximum index prefix length is 767.
• Commandline: --rocksdb-large_prefix={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_lock_scanned_rows

• Description: Take and hold locks on rows that are scanned but not updated.
• Commandline: --rocksdb-lock-scanned-rows={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_lock_wait_timeout

• Description: Number of seconds to wait for lock.
• Commandline: --rocksdb-lock-wait-timeout=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 1
• Range: 1 to 1073741824

---

rocksdb_log_dir

• Description: DBOptions::log_dir for RocksDB. Where the log files are stored. An empty value implies rocksdb_datadir is used as the directory.
• Commandline: --rocksdb-log-dir=#
• Scope: Global
• Dynamic: No
• Data Type: string
• Default Value: (Empty)
• Introduced: MariaDB 10.9.1

---

rocksdb_log_file_time_to_roll

• Description: DBOptions::log_file_time_to_roll for RocksDB.
• Commandline: --rocksdb-log-file-time-to_roll=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 0
• Range: 0 to 18446744073709551615

---

rocksdb_manifest_preallocation_size

• Description: DBOptions::manifest_preallocation_size for RocksDB.
• Commandline: --rocksdb-manifest-preallocation-size=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 4194304
• Range: 0 to 18446744073709551615

---

rocksdb_manual_compaction_threads

• Description: How many rocksdb threads to run for manual compactions.
• Commandline: --rocksdb-manual-compation-threads=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 128
• Introduced: MariaDB 10.3.10, MariaDB 10.2.18

---

rocksdb_manual_wal_flush

• Description: DBOptions::manual_wal_flush for RocksDB.
• Commandline: --rocksdb-manual-wal-flush={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON

---

rocksdb_master_skip_tx_api

• Description: Skipping holding any lock on row access. Not effective on slave.
• Commandline: --rocksdb-master-skip-tx-api={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_max_background_compactions

• Description: DBOptions::max_background_compactions for RocksDB.
• Commandline: --rocksdb-max-background-compactions=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 1
• Range: 1 to 64
• Removed: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_max_background_flushes

• Description: DBOptions::max_background_flushes for RocksDB.
• Commandline: --rocksdb-max-background-flushes=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 1
• Range: 1 to 64
• Removed: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_max_background_jobs

• Description: DBOptions::max_background_jobs for RocksDB.
• Commandline: --rocksdb-max-background-jobs=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 2
• Range: -1 to 64
• Introduced: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_max_latest_deadlocks

• Description: Maximum number of recent deadlocks to store.
• Commandline: --rocksdb-max-latest-deadlocks=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 5
• Range: 0 to 4294967295

---

rocksdb_max_log_file_size

• Description: DBOptions::max_log_file_size for RocksDB.
• Commandline: --rocksdb-max-log-file-size=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 0
• Range: 0 to 18446744073709551615

---

rocksdb_max_manifest_file_size

• Description: DBOptions::max_manifest_file_size for RocksDB.
• Commandline: --rocksdb-manifest-log-file-size=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 1073741824
• Range: 0 to 18446744073709551615

---

rocksdb_max_manual_compactions

• Description: Maximum number of pending + ongoing number of manual compactions..
• Commandline: --rocksdb-manual_compactions=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 10
• Range: 0 to 4294967295
• Introduced: MariaDB 10.3.10, MariaDB 10.2.18

---

rocksdb_max_open_files

• Description: DBOptions::max_open_files for RocksDB.
• Commandline: --rocksdb-max-open-files=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: -2
• Range: -2 to 2147483647

---

rocksdb_max_row_locks

• Description: Maximum number of locks a transaction can have.
• Commandline: --rocksdb-max-row-locks=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 1048576
• Range:
  • 1 to 1073741824 (>= MariaDB 10.3.10, MariaDB 10.2.18)
  • 1 to 1048576 (<= MariaDB 10.3.9, MariaDB 10.2.17)

---

rocksdb_max_subcompactions

• Description: DBOptions::max_subcompactions for RocksDB.
• Commandline: --rocksdb-max-subcompactions=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 1
• Range: 1 to 64

---

rocksdb_max_total_wal_size

• Description: DBOptions::max_total_wal_size for RocksDB. The maximum size limit for write-ahead-log files. Once this limit is reached, RocksDB forces the flushing of memtables.
• Commandline: --rocksdb-max-total-wal-size=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 0
• Range: 0 to 9223372036854775807

---

rocksdb_merge_buf_size

• Description: Size to allocate for merge sort buffers written out to disk during inplace index creation.
• Commandline: --rocksdb-merge-buf-size=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 67108864
• Range: 100 to 18446744073709551615

---

rocksdb_merge_combine_read_size

• Description: Size that we have to work with during combine (reading from disk) phase of external sort during fast index creation.
• Commandline: --rocksdb-merge-combine-read-size=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 1073741824
• Range: 100 to 18446744073709551615

---

rocksdb_merge_tmp_file_removal_delay_ms

• Description: Fast index creation creates a large tmp file on disk during index creation. Removing this large file all at once when index creation is complete can cause trim stalls on Flash. This variable specifies a duration to sleep (in milliseconds) between calling chsize() to truncate the file in chunks. The chunk size is the same as merge_buf_size.
• Commandline: --rocksdb-merge-tmp-file-removal-delay-ms=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 18446744073709551615

---

rocksdb_new_table_reader_for_compaction_inputs

• Description: DBOptions::new_table_reader_for_compaction_inputs for RocksDB.
• Commandline: --rocksdb-new-table-reader-for-compaction-inputs={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_no_block_cache

• Description: BlockBasedTableOptions::no_block_cache for RocksDB.
• Commandline: --rocksdb-no-block-cache={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_override_cf_options

• Description: Option overrides per cf for RocksDB. Note that the rocksdb-override-cf-options syntax is quite strict, and any typos will result in a parse error, and the MyRocks plugin will not be loaded. Depending on your configuration, the server may still start. If it does start, you can use this command to check if the plugin is loaded: select * from information_schema.plugins where plugin_name='ROCKSDB' (note that you need the "ROCKSDB" plugin. Other auxiliary plugins like "ROCKSDB_TRX" might still get loaded). Another way is to detect the error is check the error log.
• Commandline: --rocksdb-override-cf-options=value
• Scope: Global
• Dynamic: No
• Data Type: string
• Default Value: (Empty)

---

rocksdb_paranoid_checks

• Description: DBOptions::paranoid_checks for RocksDB.
• Commandline: --rocksdb-paranoid-checks={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON

---

rocksdb_pause_background_work

• Description: Disable all rocksdb background operations.
• Commandline: --rocksdb-pause-background-work={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_perf_context_level

• Description: Perf Context Level for rocksdb internal timer stat collection.
• Commandline: --rocksdb-perf-context-level=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 5

---

rocksdb_persistent_cache_path

• Description: Path for BlockBasedTableOptions::persistent_cache for RocksDB.
• Commandline: --rocksdb-persistent-cache-path=value
• Scope: Global
• Dynamic: No
• Data Type: string
• Default Value: (Empty)

---

rocksdb_persistent_cache_size_mb

• Description: Size of cache in MB for BlockBasedTableOptions::persistent_cache for RocksDB.
• Commandline: --rocksdb-persistent-cache-size-mb=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 0
• Range: 0 to 18446744073709551615

---

rocksdb_pin_l0_filter_and_index_blocks_in_cache

• Description: pin_l0_filter_and_index_blocks_in_cache for RocksDB.
• Commandline: --rocksdb-pin-l0-filter-and-index-blocks-in-cache={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON

---

rocksdb_print_snapshot_conflict_queries

• Description: Logging queries that got snapshot conflict errors into *.err log.
• Commandline: --rocksdb-print-snapshot-conflict-queries={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_rate_limiter_bytes_per_sec

• Description: DBOptions::rate_limiter bytes_per_sec for RocksDB.
• Commandline: --rocksdb-rate-limiter-bytes-per-sec=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 9223372036854775807

---

rocksdb_read_free_rpl_tables

• Description: List of tables that will use read-free replication on the slave (i.e. not lookup a row during replication).
• Commandline: --rocksdb-read-free-rpl-tables=value
• Scope: Global, Session
• Dynamic: Yes
• Data Type: string
• Default Value: (Empty)
• Removed: MariaDB 10.4.7, MariaDB 10.3.17, MariaDB 10.2.26

---

rocksdb_records_in_range

• Description: Used to override the result of records_in_range(). Set to a positive number to override.
• Commandline: --rocksdb-records-in-range=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 2147483647

---

rocksdb_remove_mariabackup_checkpoint

• Description: Remove mariabackup checkpoint.
• Commandline: --rocksdb-remove-mariabackup-checkpoint={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF
• Introduced: MariaDB 10.3.8, MariaDB 10.2.16

---

rocksdb_reset_stats

• Description: Reset the RocksDB internal statistics without restarting the DB.
• Commandline: --rocksdb-reset-stats={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF
• Introduced: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_rollback_on_timeout

• Description: Whether to roll back the complete transaction or a single statement on lock wait timeout (a single statement by default).
• Commandline: --rocksdb-rollback-on-timeout={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF
• Introduced: MariaDB 10.4.7, MariaDB 10.3.17, MariaDB 10.2.26

---

rocksdb_seconds_between_stat_computes

• Description: Sets a number of seconds to wait between optimizer stats recomputation. Only changed indexes will be refreshed.
• Commandline: --rocksdb-seconds-between-stat-computes=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 3600
• Range: 0 to 4294967295

---

rocksdb_signal_drop_index_thread

• Description: Wake up drop index thread.
• Commandline: --rocksdb-signal-drop-index-thread={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_sim_cache_size

• Description: Simulated cache size for RocksDB.
• Commandline: --rocksdb-sim-cache-size=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 0
• Range: 0 to 9223372036854775807

---

rocksdb_skip_bloom_filter_on_read

• Description: Skip using bloom filter for reads.
• Commandline: --rocksdb-skip-bloom-filter-on_read={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_skip_fill_cache

• Description: Skip filling block cache on read requests.
• Commandline: --rocksdb-skip-fill-cache={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_skip_unique_check_tables

• Description: Skip unique constraint checking for the specified tables.
• Commandline: --rocksdb-skip-unique-check-tables=value
• Scope: Global, Session
• Dynamic: Yes
• Data Type: string
• Default Value: .*

---

rocksdb_sst_mgr_rate_bytes_per_sec

• Description: DBOptions::sst_file_manager rate_bytes_per_sec for RocksDB
• Commandline: --rocksdb-sst-mgr-rate-bytes-per-sec=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 18446744073709551615

---

rocksdb_stats_dump_period_sec

• Description: DBOptions::stats_dump_period_sec for RocksDB.
• Commandline: --rocksdb-stats-dump-period-sec=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 600
• Range: 0 to 2147483647

---

rocksdb_stats_level

• Description: Statistics Level for RocksDB. Default is 0 (kExceptHistogramOrTimers).
• Commandline: --rocksdb-stats-level=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 4
• Introduced: MariaDB 10.4.7, MariaDB 10.3.17, MariaDB 10.2.26

---

rocksdb_stats_recalc_rate

• Description: The number of indexes per second to recalculate statistics for. 0 to disable background recalculation.
• Commandline: --rocksdb-stats-recalc_rate=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 4294967295
• Introduced: MariaDB 10.3.10 MariaDB 10.2.18

---

rocksdb_store_row_debug_checksums

• Description: Include checksums when writing index/table records.
• Commandline: --rocksdb-store-row-debug-checksums={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_strict_collation_check

• Description: Enforce case sensitive collation for MyRocks indexes.
• Commandline: --rocksdb-strict-collation-check={0|1}
• Scope: Global
• Dynamic: Yes
• Data Type: boolean
• Default Value: ON

---

rocksdb_strict_collation_exceptions

• Description: List of tables (using regex) that are excluded from the case sensitive collation enforcement.
• Commandline: --rocksdb-strict-collation-exceptions=value
• Scope: Global
• Dynamic: Yes
• Data Type: string
• Default Value: (Empty)

---

rocksdb_supported_compression_types

• Description: Compression algorithms supported by RocksDB. Note that RocksDB does not make use of MariaDB 10.7 compression-plugins.
• Commandline: --rocksdb-supported-compression-types=value
• Scope: Global
• Dynamic: No
• Data Type: string
• Default Value: Snappy,Zlib,ZSTDNotFinal

---

rocksdb_table_cache_numshardbits

• Description: DBOptions::table_cache_numshardbits for RocksDB.
• Commandline: --rocksdb-table-cache-numshardbits=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 6
• Range: 0 to 19

---

rocksdb_table_stats_sampling_pct

• Description: Percentage of entries to sample when collecting statistics about table properties. Specify either 0 to sample everything or percentage [1..100]. By default 10% of entries are sampled.
• Commandline: --rocksdb-table-stats-sampling-pct=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 10
• Range: 0 to 100

---

rocksdb_tmpdir

• Description: Directory for temporary files during DDL operations.
• Commandline: --rocksdb-tmpdir[=value]
• Scope: Global, Session
• Dynamic: Yes
• Data Type: string
• Default Value: (Empty)

---

rocksdb_trace_sst_api

• Description: Generate trace output in the log for each call to the SstFileWriter.
• Commandline: --rocksdb-trace-sst-api={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_two_write_queues

• Description: DBOptions::two_write_queues for RocksDB.
• Commandline: --rocksdb-two-write-queues={0|1}
• Scope: Global,
• Dynamic: No
• Data Type: boolean
• Default Value: ON
• Introduced: MariaDB 10.3.7, MariaDB 10.2.15

---

rocksdb_unsafe_for_binlog

• Description: Allowing statement based binary logging which may break consistency.
• Commandline: --rocksdb-unsafe-for-binlog={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_update_cf_options

• Description: Option updates per column family for RocksDB.
• Commandline: --rocksdb-update-cf-options=value
• Scope: Global
• Dynamic: Yes
• Data Type: varchar
• Default Value: (Empty)
• Introduced: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_use_adaptive_mutex

• Description: DBOptions::use_adaptive_mutex for RocksDB.
• Commandline: --rocksdb-use-adaptive-mutex={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_use_clock_cache

• Description: Use ClockCache instead of default LRUCache for RocksDB.
• Commandline: --rocksdb-use-clock-cache={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_use_direct_io_for_flush_and_compaction

• Description: DBOptions::use_direct_io_for_flush_and_compaction for RocksDB.
• Commandline: --rocksdb-use-direct-io-for-flush-and-compaction={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF
• Introduced: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_use_direct_reads

• Description: DBOptions::use_direct_reads for RocksDB.
• Commandline: --rocksdb-use-direct-reads={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_use_direct_writes

• Description: DBOptions::use_direct_writes for RocksDB.
• Commandline: --rocksdb-use-direct-reads={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF
• Removed: MariaDB 10.3.1, MariaDB 10.2.8

---

rocksdb_use_fsync

• Description: DBOptions::use_fsync for RocksDB.
• Commandline: --rocksdb-use-fsync={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: OFF

---

rocksdb_validate_tables

• Description: Verify all .frm files match all RocksDB tables (0 means no verification, 1 means verify and fail on error, and 2 means verify but continue.
• Commandline: --rocksdb-validate-tables=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 1
• Range: 0 to 2

---

rocksdb_verify_row_debug_checksums

• Description: Verify checksums when reading index/table records.
• Commandline: --rocksdb-verify-row-debug-checksums={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_wal_bytes_per_sync

• Description: DBOptions::wal_bytes_per_sync for RocksDB.
• Commandline: --rocksdb-wal-bytes-per-sync=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 18446744073709551615

---

rocksdb_wal_dir

• Description: DBOptions::wal_dir for RocksDB. Directory where the write-ahead-log files are stored.
• Commandline: --rocksdb-wal-dir=value
• Scope: Global
• Dynamic: No
• Data Type: string
• Default Value: (Empty)

---

rocksdb_wal_recovery_mode

• Description: DBOptions::wal_recovery_mode for RocksDB. Default is kAbsoluteConsistency. Records that are not yet committed are stored in the Write-Ahead-Log (WAL). If the server is not cleanly shut down, the recovery mode will determine the WAL recovery behavior.
  • 1: kAbsoluteConsistency. Will not start if any corrupted entries (including incomplete writes) are detected (the default).
  • 0: kTolerateCorruptedTailRecords. Ignores any errors found at the end of the WAL
  • 2: kPointInTimeRecovery. Replay of the WAL is halted after finding an error. The system will be recovered to the latest consistent point-in-time. Data from a replica can used to replay past the point-in-time.
  • 3: kSkipAnyCorruptedRecords. A risky option where any corrupted entries are skipped while subsequent healthy WAL entries are applied.
• Commandline: --rocksdb-wal-recovery-mode=#
• Scope: Global
• Dynamic: Yes
• Data Type: numeric
• Default Value: 1
• Range: 0 to 3

---

rocksdb_wal_size_limit_mb

• Description: DBOptions::WAL_size_limit_MB for RocksDB. Write-ahead-log files are moved to an archive directory once their memtables are flushed. This variable specifies the largest size, in MB, that the archive can be.
• Commandline: --rocksdb-wal-size-limit-mb=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 0
• Range: 0 to 9223372036854775807

---

rocksdb_wal_ttl_seconds

• Description: DBOptions::WAL_ttl_seconds for RocksDB. Oldest time, in seconds, that a write-ahead-log file should exist.
• Commandline: --rocksdb-wal-ttl-seconds=#
• Scope: Global
• Dynamic: No
• Data Type: numeric
• Default Value: 0
• Range: 0 to 9223372036854775807

---

rocksdb_whole_key_filtering

• Description: BlockBasedTableOptions::whole_key_filtering for RocksDB. If set (the default), the bloomfilter to use the whole key (rather than only the prefix) for filtering is enabled. Lookups should use the whole key for matching to make best use of this setting.
• Commandline: --rocksdb-whole-key-filtering={0|1}
• Scope: Global
• Dynamic: No
• Data Type: boolean
• Default Value: ON

---

rocksdb_write_batch_max_bytes

• Description: Maximum size of write batch in bytes. 0 means no limit.
• Commandline: --rocksdb-write-batch-max-bytes=#
• Scope: Global, Session
• Dynamic: Yes
• Data Type: numeric
• Default Value: 0
• Range: 0 to 18446744073709551615

---

rocksdb_write_disable_wal

• Description: WriteOptions::disableWAL for RocksDB.
• Commandline: --rocksdb-write-disable-wal={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_write_ignore_missing_column_families

• Description: WriteOptions::ignore_missing_column_families for RocksDB.
• Commandline: --rocksdb-write-ignore-missing-column-families={0|1}
• Scope: Global, Session
• Dynamic: Yes
• Data Type: boolean
• Default Value: OFF

---

rocksdb_write_policy

• Description: DBOptions::write_policy for RocksDB.
• Commandline: --rocksdb-write-policy=val
• Scope: Global
• Dynamic: No
• Data Type: enum
• Default Value: write_committed
• Valid Values: write_committed, write_prepared, write_unprepared
• Introduced: MariaDB 10.3.10, MariaDB 10.2.18

---