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| author | Charles <sircharlesaze@gmail.com> | 2020-01-09 10:55:03 +0100 |
|---|---|---|
| committer | Charles <sircharlesaze@gmail.com> | 2020-01-09 13:09:38 +0100 |
| commit | 04d6d5ca99ebfd1cebb8ce06618fb3811fc1a8aa (patch) | |
| tree | 5c691241355c943a3c68ddb06b8cf8c60aa11319 /srcs/phpmyadmin/libraries/advisory_rules_mysql_before80003.txt | |
| parent | 7e0d85db834d6351ed85d01e5126ac31dc510b86 (diff) | |
| download | ft_server-04d6d5ca99ebfd1cebb8ce06618fb3811fc1a8aa.tar.gz ft_server-04d6d5ca99ebfd1cebb8ce06618fb3811fc1a8aa.tar.bz2 ft_server-04d6d5ca99ebfd1cebb8ce06618fb3811fc1a8aa.zip | |
phpmyadmin working
Diffstat (limited to 'srcs/phpmyadmin/libraries/advisory_rules_mysql_before80003.txt')
| -rw-r--r-- | srcs/phpmyadmin/libraries/advisory_rules_mysql_before80003.txt | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/srcs/phpmyadmin/libraries/advisory_rules_mysql_before80003.txt b/srcs/phpmyadmin/libraries/advisory_rules_mysql_before80003.txt new file mode 100644 index 0000000..e28b7f4 --- /dev/null +++ b/srcs/phpmyadmin/libraries/advisory_rules_mysql_before80003.txt @@ -0,0 +1,57 @@ +# phpMyAdmin Advisory rules file +# +# See doc in advisory_rules_generic.txt +# + +# +# Query cache + +# Lame: 'ON' == 0 is true, so you need to compare 'ON' == '0' +rule 'Query cache disabled' + query_cache_size + value == 0 || query_cache_type == 'OFF' || query_cache_type == '0' + The query cache is not enabled. + The query cache is known to greatly improve performance if configured correctly. Enable it by setting {query_cache_size} to a 2 digit MiB value and setting {query_cache_type} to 'ON'. <b>Note:</b> If you are using memcached, ignore this recommendation. + query_cache_size is set to 0 or query_cache_type is set to 'OFF' + +rule 'Query cache efficiency (%)' [Com_select + Qcache_hits > 0 && !fired('Query cache disabled')] + Qcache_hits / (Com_select + Qcache_hits) * 100 + value < 20 + Query cache not running efficiently, it has a low hit rate. + Consider increasing {query_cache_limit}. + The current query cache hit rate of %s% is below 20% | round(value,1) + +rule 'Query Cache usage' [!fired('Query cache disabled')] + 100 - Qcache_free_memory / query_cache_size * 100 + value < 80 + Less than 80% of the query cache is being utilized. + This might be caused by {query_cache_limit} being too low. Flushing the query cache might help as well. + The current ratio of free query cache memory to total query cache size is %s%. It should be above 80% | round(value,1) + +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 - 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')] + Qcache_lowmem_prunes / Qcache_inserts * 100 + value > 0.1 + Cached queries are removed due to low query cache memory from the query cache. + You might want to increase {query_cache_size}, however keep in mind that the overhead of maintaining the cache is likely to increase with its size, so do this in small increments and monitor the results. + The ratio of removed queries to inserted queries is %s%. The lower this value is, the better (This rules firing limit: 0.1%) | round(value,1) + +rule 'Query cache max size' [!fired('Query cache disabled')] + query_cache_size + value > 1024 * 1024 * 128 + The query cache size is above 128 MiB. Big query caches may cause significant overhead that is required to maintain the cache. + Depending on your environment, it might be performance increasing to reduce this value. + Current query cache size: %s | ADVISOR_formatByteDown(value, 2, 2) + +rule 'Query cache min result size' [!fired('Query cache disabled')] + query_cache_limit + value == 1024*1024 + The max size of the result set in the query cache is the default of 1 MiB. + Changing {query_cache_limit} (usually by increasing) may increase efficiency. This variable determines the maximum size a query result may have to be inserted into the query cache. If there are many query results above 1 MiB that are well cacheable (many reads, little writes) then increasing {query_cache_limit} will increase efficiency. Whereas in the case of many query results being above 1 MiB that are not very well cacheable (often invalidated due to table updates) increasing {query_cache_limit} might reduce efficiency. + query_cache_limit is set to 1 MiB |
