26.4.3.43 The user_summary_by_file_io_type and x$user_summary_by_file_io_type Views
These views summarize file I/O, grouped by user and event type. By default, rows are sorted by user and descending total latency.
The user_summary_by_file_io_type and x$user_summary_by_file_io_type views have these columns:
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userThe client user name. Rows for which the
USERcolumn in the underlying Performance Schema table isNULLare assumed to be for background threads and are reported with a host name ofbackground. -
event_nameThe file I/O event name.
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totalThe total number of occurrences of the file I/O event for the user.
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latencyThe total wait time of timed occurrences of the file I/O event for the user.
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max_latencyThe maximum single wait time of timed occurrences of the file I/O event for the user.
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