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Pootle server 2011-08-06 14:40:07 +02:00
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libraries/advisory_rules.txt
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@ -139,7 +139,7 @@ rule 'Query cache fragmentation' [!fired('Query cache disabled')]
Qcache_free_blocks / (Qcache_total_blocks / 2) * 100
value > 20
The query cache is considerably fragmented.
Severe fragmentation is likely to (further) increase Qcache_lowmem_prunes. This might be caused by many Query cache low memory prunes due to {query_cache_size} being too small. For a immediate but short lived fix you can flush the query cache (might lock the query cache for a long time). Carefully adjusting {query_cache_min_res_unit} to a lower value might help too, e.g. you can set it to the average size of your queries in the cache using this formula: (query_cache_size <EFBFBD> qcache_free_memory) / qcache_queries_in_cache
Severe fragmentation is likely to (further) increase Qcache_lowmem_prunes. This might be caused by many Query cache low memory prunes due to {query_cache_size} being too small. For a immediate but short lived fix you can flush the query cache (might lock the query cache for a long time). Carefully adjusting {query_cache_min_res_unit} to a lower value might help too, e.g. you can set it to the average size of your queries in the cache using this formula: (query_cache_size - qcache_free_memory) / qcache_queries_in_cache
The cache is currently fragmented by %s% , with 100% fragmentation meaning that the query cache is an alternating pattern of free and used blocks. This value should be below 20%. | round(value,1)
rule 'Query cache low memory prunes' [Qcache_inserts > 0 && !fired('Query cache disabled')]