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2025-09-21 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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This article mainly shows you the "sample analysis of Performance_schema SQL execution statistics in Mysql", which is easy to understand and well-organized. I hope it can help you solve your doubts. Let me lead you to study and study the "sample analysis of Performance_schema SQL execution statistics in Mysql".
View the most frequently executed TOP SQL:
Can solve the problem:
Number of times 1.SQL is executed
two。 Full table scan
3. Temporary watch
Select digest_text as sql_text,count_star as exec_count,if (sum_no_good_index_used > 0 or sum_no_index_used > 0,'*',') as full_scan,sum_created_tmp_tables as tmp_tables
Sum_created_tmp_disk_tables as tmp_disk_tables
Sum_sort_rows as rows_sorted from events_statements_summary_by_digest where schema_name='ticket' and digest_text like 'select%' order by count_star desc limit 10
Generate mysql sql execution performance report
Enable performance collection of SQL
Use performance_schema
Update setup_consumers set enabled='YES' where name IN ('events_statements_history','events_statements_current','statements_digest')
Clear SQL performance data
Truncate table events_statements_current
Truncate table events_statements_history
Truncate table events_statements_summary_by_digest
Do sleep (60)
Statistics on the proportion of SQL execution
Select now (), (count_star/ (select sum (count_star) FROM events_statements_summary_by_digest) * 100) as pct, count_star as sql_exec, left (digest_text,150) as stmt, digest from events_statements_summary_by_digest order by 2 desc
Turn off performance collection for SQL:
Update setup_consumers set enabled='NO' where name IN ('events_statements_history','events_statements_current','statements_digest')
The above is all the contents of the article "sample Analysis of Performance_schema SQL execution Statistics in Mysql". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!
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