# ./mysql-tuning-primer.sh
-- MYSQL PERFORMANCE TUNING PRIMER --
- By: Matthew Montgomery -
MySQL Version 5.5.42-cll x86_64
Uptime = 0 days 21 hrs 26 min 52 sec
Avg. qps = 80
Total Questions = 6202385
Threads Connected = 5
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/5.5/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 enabled.
Current long_query_time = 1.000000 sec.
You have 10578 out of 6202406 that take longer than 1.000000 sec. to complete
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/5.5/en/point-in-time-recovery.html
WORKER THREADS
Current thread_cache_size = 12
Current threads_cached = 10
Current threads_per_sec = 0
Historic threads_per_sec = 0
Your thread_cache_size is fine
MAX CONNECTIONS
Current max_connections = 200
Current threads_connected = 5
Historic max_used_connections = 64
The number of used connections is 32% of the configured maximum.
Your max_connections variable seems to be fine.
INNODB STATUS
Current InnoDB index space = 315 M
Current InnoDB data space = 675 M
Current InnoDB buffer pool free = 0 %
Current innodb_buffer_pool_size = 760 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 : 3.66 G
Configured Max Per-thread Buffers : 6.73 G
Configured Max Global Buffers : 1.50 G
Configured Max Memory Limit : 8.24 G
Physical Memory : 17.08 G
Max memory limit seem to be within acceptable norms
KEY BUFFER
Runtime error (func=(main), adr=10): Divide by zero
(standard_in) 1: syntax error
Current MyISAM index space = 1.22 G
Current key_buffer_size = 0 bytes
Key cache miss rate is 1 : 1
Key buffer free ratio = %
./mysql-tuning-primer.sh: line 795: [: -le: unary operator expected
./mysql-tuning-primer.sh: line 799: [: -le: unary operator expected
./mysql-tuning-primer.sh: line 803: [: -le: unary operator expected
Your key_buffer_size seems to be fine
QUERY CACHE
Query cache is enabled
Current query_cache_size = 768 M
Current query_cache_used = 442 M
Current query_cache_limit = 768 M
Current Query cache Memory fill ratio = 57.67 %
Current query_cache_min_res_unit = 4 K
MySQL won't cache query results that are larger than query_cache_limit in size
SORT OPERATIONS
Current sort_buffer_size = 2 M
Current read_rnd_buffer_size = 256 K
Sort buffer seems to be fine
JOINS
Current join_buffer_size = 16.00 M
You have had 9513 queries where a join could not use an index properly
You have had 30087 joins without keys that check for key usage after each row
join_buffer_size >= 4 M
This is not advised
You should enable "log-queries-not-using-indexes"
Then look for non indexed joins in the slow query log.
OPEN FILES LIMIT
Current open_files_limit = 43762 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 = 728 tables
Current table_definition_cache = 400 tables
You have a total of 13669 tables
You have 728 open tables.
Current table_cache hit rate is 0%
, while 100% of your table cache is in use
You should probably increase your table_cache
You should probably increase your table_definition_cache value.
TEMP TABLES
Current max_heap_table_size = 1.00 G
Current tmp_table_size = 1.00 G
Of 380288 temp tables, 31% were created on disk
Perhaps you should increase your tmp_table_size and/or max_heap_table_size
to reduce the number of disk-based temporary tables
Note! BLOB and TEXT columns are not allow in memory tables.
If you are using these columns raising these values might not impact your
ratio of on disk temp tables.
TABLE SCANS
Current read_buffer_size = 16 M
Current table scan ratio = 12531 : 1
read_buffer_size is over 8 MB there is probably no need for such a large read_buffer
TABLE LOCKING
Current Lock Wait ratio = 1 : 887
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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