host_summary_by_file_io and x$host_summary_by_file_io Sys Schema Views
MariaDB starting with 10.6
These Sys Schema views were introduced in MariaDB 10.6
Description
The host_summary_by_file_io and x$host_summary_by_file_io views summarize file I/O, grouped by host. Rows are sorted by descending total file I/O latency by default.
The host_summary_by_file_io view is intended to be easier for human reading, while the and x$host_summary_by_file_io view provides the data in raw form, intended for tools that process the data.
They contain the following columns:
| Column | Description |
|---|---|
| host | Host that the client connected from, or background for background threads (where the HOST column in the underlying Performance Schema table is NULL). |
| ios | Total file I/O events for the host. |
| ios_latency | Total wait time of timed file I/O events for the host. |
Example
SELECT * FROM sys.host_summary_by_file_io\G
*************************** 1. row ***************************
host: localhost
ios: 6526
io_latency: 490.28 ms
*************************** 2. row ***************************
host: background
ios: 457
io_latency: 151.39 ms
SELECT * FROM sys.x$host_summary_by_file_io\G
*************************** 1. row ***************************
host: localhost
ios: 6532
io_latency: 490447878974
*************************** 2. row ***************************
host: background
ios: 457
io_latency: 151388125856
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