MySQL 8.0 Reference Manual Including MySQL NDB Cluster 8.0
These views list statements with runtimes in the 95th percentile. By default, rows are sorted by descending average latency.
Both views use two helper views,
x$ps_digest_avg_latency_distribution and
x$ps_digest_95th_percentile_by_avg_us.
The
statements_with_runtimes_in_95th_percentile
and
x$statements_with_runtimes_in_95th_percentile
views have these columns:
query
The normalized statement string.
db
The default database for the statement, or
NULL if there is none.
full_scan
The total number of full table scans performed by occurrences of the statement.
exec_count
The total number of times the statement has executed.
err_count
The total number of errors produced by occurrences of the statement.
warn_count
The total number of warnings produced by occurrences of the statement.
total_latency
The total wait time of timed occurrences of the statement.
max_latency
The maximum single wait time of timed occurrences of the statement.
avg_latency
The average wait time per timed occurrence of the statement.
rows_sent
The total number of rows returned by occurrences of the statement.
rows_sent_avg
The average number of rows returned per occurrence of the statement.
rows_examined
The total number of rows read from storage engines by occurrences of the statement.
rows_examined_avg
The average number of rows read from storage engines per occurrence of the statement.
first_seen
The time at which the statement was first seen.
last_seen
The time at which the statement was most recently seen.
digest
The statement digest.