mysql 5.1 - innodb - query_cache_size - 9,418,108 queries have been removed from the query cache due to lack of memory

Posted by Tom C on Server Fault See other posts from Server Fault or by Tom C
Published on 2012-08-29T15:32:41Z Indexed on 2012/08/29 15:39 UTC
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Filed under:

linux

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mysql

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innodb

Currently running on a 16GB system - Ubuntu 64 bit. INnodb Buffer Pool is set to 10GB.

tuning-primer shows the following:

QUERY CACHE
Query cache is enabled
Current query_cache_size = 512 M
Current query_cache_used = 501 M
Current query_cache_limit = 4 M
Current Query cache Memory fill ratio = 97.87 %
Current query_cache_min_res_unit = 4 K
However, 9418108 queries have been removed from the query cache due to lack of memory
Perhaps you should raise query_cache_size

That is over 9million queries removed. System uptime is 8 days. Should I remove the Query Cache altogether? Our db is always under heavy I/O.

tia

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