set global variable parameter?
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16-12-2020 - |
سؤال
My prod_server version is 5.1.47 and want to set the slow query log dynamically for certain period of time. I refered one site(http://toastergremlin.com/?p=276) there is mentioned below 5.1.6 we need to set the variables into the my.cnf, but my prod_server is critical can't take my server restart is there any way we set variables dynamically for certain period of time?
Thank u in advance please help.
المحلول
You can set any global variables to any value on the fly using below statement in MySQL prompt:
set global <variable> = <value>;
In your case use the following to turn on slow query log:
set global slow_query_log=1;
By default the "slow wait time" is set to 10 sec, but you can change it as well.
Hope it helps.
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