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added new value Query_Cache_Hit_Rate

This commit is contained in:
Jordi Sanfeliu 2013-01-16 15:11:51 +01:00
parent a097c3dccb
commit 4a39724fd2
1 changed files with 6 additions and 2 deletions
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8
man/man5/monitorix.conf.5
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@ -898,9 +898,13 @@ Higher is better.
.P
\fBQuery Cache Hit Rate\fP
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\fBQcache_hits / Qcache_inserts\fP
\fBQcache_hits / (Qcache_hits + Com_select) * 100\fP
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Higher should be considered better. This value should grow proportionally with the number of executed queries, if the query cache is performing well. Please also have a look at the \fBQuery cache usage\fP percentage to know if your query_cache configuration is appropriate.
Higher should be considered better.
.br
A query cache size increase is recommended if the query cache usage is very close to 100% and the query cache hit rate is far from 100%. But sometimes a size increase will not lead to a better hit rate: this means that the increase was not needed and that the application do not run enough cacheable SELECT queries.
.br
This value should grow proportionally with the number of executed queries as long as the query cache is performing well. Please also have a look at the \fBQuery cache usage\fP percentage to know if your query_cache configuration is appropriate.
.P
\fBQuery Cache Usage\fP
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