# Profiling

**URL:** <https://forums.percona.com/t/profiling/1680>\
**Category:** Other MySQL® Questions\
**Created:** [September 29, 2011, 5:00pm UTC](https://forums.percona.com/t/profiling/1680 "2011-09-29T17:00:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![schnix](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@schnix](https://forums.percona.com/u/schnix)\
**Post date:** [September 29, 2011, 5:00pm UTC](https://forums.percona.com/t/profiling/1680/1 "2011-09-29T17:00:47Z")

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hi,

today i reactivated some of my older goodies, but for some reason i cannot get the profiling to work.  
information\_schema.profiling sticks empty even if i manually start/end profiling SET PROFILING = 1 … SET PROFILING = 0.

seems like profiling is somehow deactivated?

and long\_query\_time = 0 with pt-query-digest is the better way to profile now?

schnix

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<div class="post-metadata">

**Author:** ![revin](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/revin/32/824_2.png) [@revin](https://forums.percona.com/u/revin)\
**Post date:** [September 29, 2011, 9:31pm UTC](https://forums.percona.com/t/profiling/1680/2 "2011-09-29T21:31:03Z")

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What does SELECT @@version, @@version\_comment and SHOW ENGINES gives?

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<div class="post-metadata">

**Author:** ![schnix](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@schnix](https://forums.percona.com/u/schnix)\
**Post date:** [September 30, 2011, 6:04am UTC](https://forums.percona.com/t/profiling/1680/3 "2011-09-30T06:04:10Z")

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SELECT @@version, @@version\_comment

5.5.15-55-log Percona Server (GPL), Release 21.0

SHOW ENGINES

Engine Support Comment Transactions XA Savepoints  
MRG\_MYISAM YES Collection of identical MyISAM tables NO NO NO  
CSV YES CSV storage engine NO NO NO  
MyISAM YES MyISAM storage engine NO NO NO  
BLACKHOLE YES /dev/null storage engine (anything you write to it… NO NO NO  
MEMORY YES Hash based, stored in memory, useful for temporary… NO NO NO  
InnoDB DEFAULT Percona-XtraDB, Supports transactions, row-level l… YES YES YES  
ARCHIVE YES Archive storage engine NO NO NO  
FEDERATED NO Federated MySQL storage engine NULL NULL NULL  
PERFORMANCE\_SCHEMA YES Performance Schema NO NO NO

thx for reply