… free memory. root@server [~]# date;mysqladmin ext|awk ‘/Qcache/ && /free_blocks/ || /free_memory/ || /lowmem_prunes/’ Thu Oct 20 03:42:03 EDT 2011 | Qcache_free_blocks | 117773 | | Qcache_free_memory | 147256440 | | Qcache_lowmem_prunes | 1849687 | root@server [~]# date;mysqladmin ext|awk ‘/Qcache/ && /free_blocks/ || /free_memory/ || /lowmem_prunes/’ Thu…
Post: MySQL Query Cache
July 27, 2006 By 70 Comments
… performance. This can be seen as large value of Qcache_free_blocks relatively to Qcache_free_memory. FLUSH QUERY CACHE command can be used for… certain value and watch Qcache_free_memory and Qcache_lowmem_prunes – If you’re not getting much of lowmem_prunes and free_memory stays high you…
Post: Query_cache and column level privileges
August 6, 2007 By 5 Comments
…sec) mysql> show global status like ‘qcache%’; +————————-+———-+ | Variable_name | Value | +————————-+———-+ | Qcache_free_memory | 67089640 | | Qcache_hits | 0 | | Qcache_inserts | 1 | | Qcache_queries_in_cache | 1 | +————————-+———-+ 8…
Comment: MySQL Server Memory Usage
September 1, 2006 By 21 Comments
…’, ’183240′ ‘Qcache_free_blocks’, ’136′ ‘Qcache_free_memory‘, ’10272736′ ‘Qcache_hits’, ’14774371′ ‘Qcache_inserts’, ’83902401′ ‘Qcache_lowmem_prunes’, ’4314′ ‘Qcache_not_cached’, ’294363493′ ‘Qcache_queries_in_cache’, ’177′ ‘Qcache_total_blocks… 248 0 # vmstat 5 2 procs memory swap io system cpu r b swpd free buff cache si so bi bo in…
Comment: Using MyISAM in production
July 6, 2006 By 36 Comments
… | Value | +————————-+———–+ | Qcache_free_blocks | 5303 | | Qcache_free_memory | 486708416 | | Qcache_hits | 2845741 | | Qcache_inserts | 2623234 | | Qcache_lowmem_prunes | 0 | | Qcache_not_cached | 2638244 | | Qcache_queries_in_cache | 26168 | | Qcache_total_blocks…
Post: Ultimate MySQL variable and status reference list
January 8, 2011 By 4 Comments
…Qcache_free_blocksblogpercona.commanual Qcache_free_memoryblogpercona.commanual Qcache_hitsblogpercona.commanual Qcache_insertsblogpercona.commanual Qcache_lowmem_prunesblogpercona.commanual Qcache_not_cachedblogpercona.commanual Qcache_queries_in_cacheblogpercona.commanual Qcache… shared_memory_base…
Comment: MySQL Query Cache
July 20, 2011 By 70 Comments
…)/Qcache_hits =(2029732811+166042669+1678664993)/984286623 =3.9363 Variable_name Value Qcache_free_blocks 18580 Qcache_free_memory 53059640 Qcache_hits 984929059 Qcache_inserts 36451881 Qcache_lowmem_prunes 1198358 Qcache_not_cached 244851098 Qcache_queries_in_cache 32379 Qcache_total…
Comment: MySQL Query Cache
November 2, 2011 By 70 Comments
…, 0 Qcache_free_blocks, 1 Qcache_free_memory, 536834160 Qcache_hits, 0 Qcache_inserts, 2 Qcache_lowmem_prunes, 0 Qcache_not_cached, 15 Qcache_queries_in_cache, 2 Qcache_total_blocks…
Comment: MySQL Query Cache
January 10, 2011 By 70 Comments
… app, I always saw a high query cache fragmentation (large Qcache_free_blocks) – leading to many lowmem prunes. Raising the query cache…_cache_min_res_unit, using this formula: (query_cache_size – qcache_free_memory) / qcache_queries_in_cache This is the average size of a…
Comment: MySQL Query Cache
December 23, 2008 By 70 Comments
… QUERY CACHE needs to be run to defragment the free blocks. The Qcache_free_blocks in my server had some high value (~1500… fragments are also cleaned up) when it runs out of memory (pruning)? I was planning to have a cron to run…
