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5.12.1 Viewing MySQL Trace Information
https://dev.mysql.com/doc/connector-net/en/connector-net-programming-tracing-mysql.html
MySQL :: MySQL Internals Manual :: 8.4 Traceable Queries
https://dev.mysql.com/doc/internals/en/traceable-queries.html
MySQL Internals Manual / Tracing the Optimizer / Traceable Queries 8.4 Traceable Queries They are: SELECT; INSERT or REPLACE (with VALUES or SELECT); UPDATE/DELETE and their multi-table variants; all the previous ones prefixed by EXPLAIN; SET (unless it manipulates the optimizer_trace system variable); DO; DECLARE/CASE/IF/RETURN (stored routines language …
mysql query tracing - Stack Overflow
https://stackoverflow.com/questions/11854105/mysql-query-tracing
I see general_log=1 in the my.cnf but I am not able to find where exactly is mysql logging all the queries. I read that it usually logs into a file or table. If it is a file then the file name is
MySQL :: MySQL Internals Manual :: 8.14 Example
https://dev.mysql.com/doc/internals/en/tracing-example.html
Now we look at the trace: SELECT * FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES SELECT SUM(alias2.col_varchar_nokey) , alias2.pk AS field2 FROM t1 AS alias1 STRAIGHT_JOIN t2 AS alias2 ON alias2.pk = alias1.col_int_key WHERE alias1.pk GROUP BY field2 ORDER BY …
MySQL: The Optimizer Trace
https://dev.mysql.com/doc/dev/mysql-server/latest/PAGE_OPT_TRACE.html
SET SESSION OPTIMIZER_TRACE="enabled=on"; # enable tracing <statement to trace>; # like SELECT, EXPLAIN SELECT, UPDATE, DELETE... SELECT * FROM information_schema.OPTIMIZER_TRACE; [ repeat last two steps at will ] SET SESSION OPTIMIZER_TRACE="enabled=off"; # disable tracing SELECT and EXPLAIN SELECT produce …
Tracking MySQL query history in long running transactions
https://www.psce.com/en/blog/2015/01/22/tracking-mysql-query-history-in-long-running-transactions/
Given a long running time of say 1 second, we can do the following. To avoid collecting system transactions we can join to the processlist table and eliminate system users from the list. SELECT trx. trx_id, trx. trx_started, trx. trx_mysql_thread_id FROM INFORMATION_SCHEMA. INNODB_TRX trx JOIN INFORMATION_SCHEMA.
How can i track all queries in my MySQL server? - Server Fault
https://serverfault.com/questions/139622/how-can-i-track-all-queries-in-my-mysql-server
First, the general query log tracks all statements executed on the MySQL server, including SELECTs. But it's slow, inefficient, and can easily kill the performance of a production database, so be careful with it.
Basic MySQL Optimizer Tracing for Data Performance
https://distributeddba.com/blog/database-administration/data-performance/basic-mysql-optimizer-tracing/
Tracing MySQL’s optimizer. To trace the MySQL optimizer, you have to turn it on for your session. This is achieved by setting optimizer_trace="enabled=on". Enable MySQL optimizer tracing. Be warned though, the output can be long. Then you run the query you want to trace. You can retrieve the results of the trace from the INFORMATION_SCHEMA.OPTIMIZER_TRACE table. Tracing a …
MySQL :: MySQL Internals Manual :: 8.1 Typical Usage
https://dev.mysql.com/doc/internals/en/optimizer-tracing-typical-usage.html
Press CTRL+C to copy. # Turn tracing on (it's off by default): SET optimizer_trace="enabled=on"; SELECT ...; # your query here SELECT * FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; # possibly more queries... # When done with tracing, disable it: SET optimizer_trace="enabled=off"; A session can trace only statements which it executes; it cannot see a trace of another session.
MySQL :: MySQL Internals Manual :: 8 Tracing the Optimizer
https://dev.mysql.com/doc/internals/en/optimizer-tracing.html
In MySQL 5.6, a new tracing capability was added to the MySQL optimizer. The interface is provided by a set of optimizer_trace_xxx system variables and the INFORMATION_SCHEMA.OPTIMIZER_TRACE table, but is subject to change.
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