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Update performance.rst

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Small style fixes
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Jos Poortvliet
2014-08-14 18:50:53 +02:00
parent 8463f37eef
commit 7c807ec112
1 changed files with 8 additions and 8 deletions
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developer_manual/general/performance.rst
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@@ -26,29 +26,29 @@ With MySQL is is very easy with just a bit of configuration:
1. Slow query log.
If you put this into your my.cnf file than every query that takes longer than one second is logged to a logfile.
If you put this into your my.cnf file than every query that takes longer than one second is logged to a logfile::
log_slow_queries = 1
log_slow_queries = /var/log/mysql/mysql-slow.log
long_query_time=1
log_slow_queries = 1
log_slow_queries = /var/log/mysql/mysql-slow.log
long_query_time=1
If a query takes over one second than we have a serious problem of course. You can watch it with `tail -f /var/log/mysql/mysql-slow.log` while using ownCloud.
2. log all queries.
If you reduce the long_query_time to zero than every statement is logged. This is super helpful to see what is going on. Just do a `tail -f` on the logfile and click around in the interface or access the WebDAV interface.
If you reduce the long_query_time to zero than every statement is logged. This is super helpful to see what is going on. Just do a `tail -f` on the logfile and click around in the interface or access the WebDAV interface::
log_slow_queries = 1
log_slow_queries = /var/log/mysql/mysql-slow.log
log_slow_queries = /var/log/mysql/mysql-slow.log
long_query_time=0
3. log queries without an index.
If you increase the long_query_time to 100 and add log-queries-not-using-indexes than all the queries that are not using an index are logged. Every query should always use an index. So ideally there should be no output.
If you increase the long_query_time to 100 and add log-queries-not-using-indexes than all the queries that are not using an index are logged. Every query should always use an index. So ideally there should be no output::
log-queries-not-using-indexes
log_slow_queries = 1
log_slow_queries = /var/log/mysql/mysql-slow.log
log_slow_queries = /var/log/mysql/mysql-slow.log
long_query_time=100
Measuring performance