MySQL的性能调优工具:tuning-primer.sh

http://5iwww.blog.51cto.com/856039/293558/

 工作需要，最近要调整数据库，性能上做一些优化，对于我这个新手来说，数据库调优？都需要优化什么，哪些东西会影响到数据库的性能呢？一头雾水。。。囧。。

    Google了一下。。PS：貌似谷歌走了之后，这页面打开慢了呢？心里作用。

    查到个工具：tuning-primer.sh 

    

    琢磨下吧。。。

    

[root@killer mysql]# sh tuning-primer.sh 

Using login values from ~/.my.cnf

- INITIAL LOGIN ATTEMPT FAILED -

Testing for stored webmin passwords:

 None Found

Could not auto detect login info!

Found Sockets: /var/lib/mysql/mysql.sock

Using: /var/lib/mysql/mysql.sock

Would you like to provide a different socket?: [y/N] n  此处选N即可

Do you have your login handy ? [y/N] : y

User: 连接mysql用户名

Password: 密码

 

Would you like me to create a ~/.my.cnf file for you? [y/N] : y

~/.my.cnf already exists!  由于刚才我配置过了，这里提示该文件已存在，不鸟它，继续

Replace ? [y/N] : y     替换它,然后。。。耐心等待。报表出现

报表样例

PS:这是我的测试机。。。。没怎么用过。。。还是奔4的呢。。。

-- MYSQL PERFORMANCE TUNING PRIMER --

             - By: Matthew Montgomery -

MySQL Version 5.1.30 i686

Uptime = 30 days 11 hrs 21 min 37 sec

Avg. qps = 0

Total Questions = 519166

Threads Connected = 1

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/5.1/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 1 out of 519187 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 NOT enabled.

You will not be able to do point in time recovery

See http://dev.mysql.com/doc/refman/5.1/en/point-in-time-recovery.html

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 = 1

Historic max_used_connections = 8

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 = 99 M

Current InnoDB data space = 449 M

Current InnoDB buffer pool free = 0 %

Current innodb_buffer_pool_size = 8 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 : 39 M

Configured Max Per-thread Buffers : 405 M

Configured Max Global Buffers : 17 M

Configured Max Memory Limit : 423 M

Physical Memory : 1.97 G

Max memory limit seem to be within acceptable norms

KEY BUFFER

No key reads?!

Seriously look into using some indexes

Current MyISAM index space = 132 K

Current key_buffer_size = 7 M

Key cache miss rate is 1 : 0

Key buffer free ratio = 88 %

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 = 2 M

Current read_rnd_buffer_size = 256 K

Sort buffer seems to be fine

JOINS

Current join_buffer_size = 132.00 K

You have had 0 queries where a join could not use an index properly

Your joins seem to be using indexes properly

OPEN FILES LIMIT

Current open_files_limit = 1024 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 = 256 tables

You have a total of 93 tables

You have 64 open tables.

Current table_cache hit rate is 8%

, 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 15443 temp tables, 1% were created on disk

Created disk tmp tables ratio seems fine

TABLE SCANS

Current read_buffer_size = 128 K

Current table scan ratio = 11 : 1

read_buffer_size seems to be fine

TABLE LOCKING

Current Lock Wait ratio = 0 : 519442

Your table locking seems to be fine

本文出自 “运维工作记录” 博客，请务必保留此出处http://5iwww.blog.51cto.com/856039/293558