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- -- MYSQL PERFORMANCE TUNING PRIMER --
- - By: Matthew Montgomery -
- MySQL Version 5.6.17 amd64
- Uptime = 0 days 0 hrs 7 min 30 sec
- Avg. qps = 115
- Total Questions = 51881
- Threads Connected = 4
- Warning: Server has not been running for at least 48hrs.
- It may not be safe to use these recommendations
- To find out more information on how each of these
- runtime variables effects performance visit:
- http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html
- Visit http://www.mysql.com/products/enterprise/advisors.html
- for info about MySQL's Enterprise Monitoring and Advisory Service
- SLOW QUERIES
- The slow query log is NOT enabled.
- Current long_query_time = 10.000000 sec.
- You have 0 out of 51930 that take longer than 10.000000 sec. to complete
- [: 0.00000000000000000000: bad number
- Your long_query_time seems to be fine
- BINARY UPDATE LOG
- The binary update log is NOT enabled.
- You will not be able to do point in time recovery
- See http://dev.mysql.com/doc/refman/5.6/en/point-in-time-recovery.html
- WORKER THREADS
- Current thread_cache_size = 9
- Current threads_cached = 5
- Current threads_per_sec = 0
- Historic threads_per_sec = 0
- Your thread_cache_size is fine
- MAX CONNECTIONS
- Current max_connections = 151
- Current threads_connected = 4
- Historic max_used_connections = 9
- The number of used connections is 5% of the configured maximum.
- You are using less than 10% of your configured max_connections.
- Lowering max_connections could help to avoid an over-allocation of memory
- See "MEMORY USAGE" section to make sure you are not over-allocating
- INNODB STATUS
- Current InnoDB index space = 26 M
- Current InnoDB data space = 48 M
- Current InnoDB buffer pool free = 85 %
- Current innodb_buffer_pool_size = 128 M
- Depending on how much space your innodb indexes take up it may be safe
- to increase this value to up to 2 / 3 of total system memory
- MEMORY USAGE
- Max Memory Ever Allocated : 163 M
- Configured Max Per-thread Buffers : 169 M
- Configured Max Global Buffers : 153 M
- Configured Max Memory Limit : 322 M
- Physical Memory : 16.75 G
- Max memory limit seem to be within acceptable norms
- KEY BUFFER
- Current MyISAM index space = 1.37 G
- Current key_buffer_size = 8 M
- Key cache miss rate is 1 : 43
- Key buffer free ratio = 0 %
- You could increase key_buffer_size
- It is safe to raise this up to 1/4 of total system memory;
- assuming this is a dedicated database server.
- QUERY CACHE
- Query cache is enabled
- Current query_cache_size = 1 M
- Current query_cache_used = 16 K
- Current query_cache_limit = 1 M
- Current Query cache Memory fill ratio = 1.63 %
- Current query_cache_min_res_unit = 4 K
- Your query_cache_size seems to be too high.
- Perhaps you can use these resources elsewhere
- MySQL won't cache query results that are larger than query_cache_limit in size
- SORT OPERATIONS
- Current sort_buffer_size = 256 K
- Current read_rnd_buffer_size = 256 K
- Sort buffer seems to be fine
- JOINS
- Current join_buffer_size = 260.00 K
- You have had 189 queries where a join could not use an index properly
- You have had 9 joins without keys that check for key usage after each row
- You should enable "log-queries-not-using-indexes"
- Then look for non indexed joins in the slow query log.
- If you are unable to optimize your queries you may want to increase your
- join_buffer_size to accommodate larger joins in one pass.
- Note! This script will still suggest raising the join_buffer_size when
- ANY joins not using indexes are found.
- OPEN FILES LIMIT
- Current open_files_limit = 11095 files
- The open_files_limit should typically be set to at least 2x-3x
- that of table_cache if you have heavy MyISAM usage.
- Your open_files_limit value seems to be fine
- TABLE CACHE
- Current table_open_cache = 2000 tables
- Current table_definition_cache = 1400 tables
- You have a total of 1581 tables
- You have 1647 open tables.
- The table_cache value seems to be fine
- You should probably increase your table_definition_cache value.
- TEMP TABLES
- Current max_heap_table_size = 16 M
- Current tmp_table_size = 16 M
- Of 2069 temp tables, 23% were created on disk
- Created disk tmp tables ratio seems fine
- TABLE SCANS
- Current read_buffer_size = 128 K
- Current table scan ratio = 1813 : 1
- read_buffer_size seems to be fine
- TABLE LOCKING
- Current Lock Wait ratio = 1 : 2060
- You may benefit from selective use of InnoDB.
- If you have long running SELECT's against MyISAM tables and perform
- frequent updates consider setting 'low_priority_updates=1'
- If you have a high concurrency of inserts on Dynamic row-length tables
- consider setting 'concurrent_insert=ALWAYS'.
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