参考:

脚本源码
https://launchpadlibrarian.net/78745738/tuning-primer.sh
http://www.cnblogs.com/zuoxingyu/archive/2013/04/09/3010024.html

环境
my.cnf中[client]需要配置使用的用户,执行show status/variables权限，可以给super
user = myadmin
password = myadmin

输出结果

点击(此处)折叠或打开

-- MYSQL PERFORMANCE TUNING PRIMER --
- By: Matthew Montgomery -
MySQL Version 5.5.19-log x86_64
Uptime = 23 days 3 hrs 17 min 8 sec
Avg. qps = 2
Total Questions = 4543819
Threads Connected = 10
Server has been running for over 48hrs.
It should be safe to follow 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 NOT enabled.
Current long_query_time = 10.000000 sec.
You have 21 out of 4543840 that take longer than 10.000000 sec. to complete
Your long_query_time seems to be fine
BINARY UPDATE LOG
The binary update log is enabled
The expire_logs_days is not set.
The mysqld will retain the entire binary log until RESET MASTER or PURGE MASTER LOGS commands are run manually
Setting expire_logs_days will allow you to remove old binary logs automatically
See http://dev.mysql.com/doc/refman/5.5/en/purge-master-logs.html
Binlog sync is not enabled, you could loose binlog records during a server crash
WORKER THREADS
Current thread_cache_size = 0
Current threads_cached = 0
Current threads_per_sec = 1
Historic threads_per_sec = 0
Your thread_cache_size is fine
MAX CONNECTIONS
Current max_connections = 151
Current threads_connected = 10
Historic max_used_connections = 152
The number of used connections is 100% of the configured maximum.
You should raise max_connections
INNODB STATUS
Current InnoDB index space = 0 bytes
Current InnoDB data space = 0 bytes
Current InnoDB buffer pool free = 0 %
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 : 411 M
Configured Max Per-thread Buffers : 250 M
Configured Max Global Buffers : 160 M
Configured Max Memory Limit : 410 M
Physical Memory : 3.73 G
Max memory limit seem to be within acceptable norms
KEY BUFFER
Current MyISAM index space = 9 K
Current key_buffer_size = 16 M
Key cache miss rate is 1 : 659
Key buffer free ratio = 81 %
Your key_buffer_size seems to be fine
QUERY CACHE
Query cache is supported but not enabled
Perhaps you should set the query_cache_size
SORT OPERATIONS
Current sort_buffer_size = 512 K
Current read_rnd_buffer_size = 512 K
Sort buffer seems to be fine
JOINS
Current join_buffer_size = 132.00 K
You have had 398 queries where a join could not use an index properly
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 = 60000 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 = 64 tables
Current table_definition_cache = 400 tables
You have a total of 0 tables
You have 64 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
TEMP TABLES
Current max_heap_table_size = 16 M
Current tmp_table_size = 16 M
Of 303828 temp tables, 1% were created on disk
Created disk tmp tables ratio seems fine
TABLE SCANS
Current read_buffer_size = 256 K
Current table scan ratio = 60 : 1
read_buffer_size seems to be fine
TABLE LOCKING
Current Lock Wait ratio = 1 : 12920
Your table locking seems to be fine

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检查配置参数脚本。tuning-primer.sh

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