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Replace log_slow_queries for slow_query_log

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Fixes #518.
This commit is contained in:
Hugo Martins
2017-10-29 21:33:17 +00:00
committed by GitHub
parent 86ac31c17d
commit b6878d8fff
1 changed files with 6 additions and 6 deletions
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12
developer_manual/general/performance.rst
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@@ -29,8 +29,8 @@ With MySQL it is very easy with just a bit of configuration:
If you put this into your my.cnf file, 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
slow_query_log = 1
slow_query_log = /var/log/mysql/mysql-slow.log
long_query_time=1
If a query takes more than a second we have a serious problem of course. You can watch it with `tail -f /var/log/mysql/mysql-slow.log` while using Nextcloud.
@@ -39,8 +39,8 @@ If a query takes more than a second we have a serious problem of course. You can
If you reduce the long_query_time to zero then 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
slow_query_log = 1
slow_query_log = /var/log/mysql/mysql-slow.log
long_query_time=0
3. log queries without an index.
@@ -48,8 +48,8 @@ If you reduce the long_query_time to zero then every statement is logged. This i
If you increase the long_query_time to 100 and add log-queries-not-using-indexes, 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
slow_query_log = 1
slow_query_log = /var/log/mysql/mysql-slow.log
long_query_time=100
Measuring performance