Rechercher dans le manuel MySQL
These views summarize overall statement statistics, grouped by user. By default, rows are sorted by descending total latency.
The
user_summary_by_statement_latency
and
x$user_summary_by_statement_latency
views have these columns:
user
The client user name. Rows for which the
USER
column in the underlying Performance Schema table isNULL
are assumed to be for background threads and are reported with a host name ofbackground
.total
The total number of statements for the user.
total_latency
The total wait time of timed statements for the user.
max_latency
The maximum single wait time of timed statements for the user.
lock_latency
The total time waiting for locks by timed statements for the user.
rows_sent
The total number of rows returned by statements for the user.
rows_examined
The total number of rows read from storage engines by statements for the user.
rows_affected
The total number of rows affected by statements for the user.
full_scans
The total number of full table scans by statements for the user.
Document created the 26/06/2006, last modified the 26/10/2018
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