host_summary and x$host_summary Sys Schema Views
MariaDB starting with 10.6
These Sys Schema views were introduced in MariaDB 10.6
Description
The host_summary and x$host_summary views contain host activity information, grouped by host. The host_summary view is intended to be easier for human reading, while the x$host_summary view provides the data in raw form, intended for tools that process the data.
They contain the following columns:
| Column | Description |
|---|---|
| host | Host that the client connected from, or background for background threads (where the HOST column in the underlying Performance Schema table is NULL). |
| statements | Total number of statements for the host. |
| statement_latency | Total wait time of timed statements for the host. |
| statement_avg_latency | Average wait time per timed statement for the host. |
| table_scans | Total table scans for the host. |
| file_ios | Total file I/O events for the host. |
| file_io_latency | Total wait time of timed file I/O events for the host. |
| current_connections | Current connections for the host. |
| total_connections | Total connections for the host. |
| unique_users | Number of distinct users for the host. |
| current_memory | Current allocated memory for the host. |
| total_memory_allocated | Total allocated memory for the host. |
Example
SELECT * FROM sys.host_summary\G
*************************** 1. row ***************************
host: localhost
statements: 59
statement_latency: 148.11 ms
statement_avg_latency: 2.51 ms
table_scans: 11
file_ios: 2065
file_io_latency: 79.57 ms
current_connections: 1
total_connections: 3
unique_users: 1
current_memory: -2672 bytes
total_memory_allocated: 0 bytes
SELECT * FROM sys.x$host_summary\G
*************************** 1. row ***************************
host: localhost
statements: 98
statement_latency: 160926285000
statement_avg_latency: 1642104948.9796
table_scans: 12
file_ios: 2071
file_io_latency: 79742533755
current_connections: 1
total_connections: 3
unique_users: 1
current_memory: -2672
total_memory_allocated: 0
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