mysql数据库调试_mysql数据库参数性能调试工具：tuning-primer.sh

tuning-primer.sh

运行

root@db1:~$ ./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 potential sockets: /tmp/mysql.sock

Using: /tmp/mysql.sock

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

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

User: root

Password: 2xfghuh

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

-- MYSQL PERFORMANCE TUNING PRIMER --

- By: Matthew Montgomery -

MySQL Version 5.1.56-log x86_64

Uptime = 6 days 5 hrs 53 min 29 sec

Avg. qps = 40420

Total Questions = 21811220771

Threads Connected = 296

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 enabled.

Current long_query_time = 10.000000 sec.

You have 319 out of 21811222992 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

WORKER THREADS

Current thread_cache_size = 64

Current threads_cached = 17

Current threads_per_sec = 0

Historic threads_per_sec = 0

Your thread_cache_size is fine

MAX CONNECTIONS

Current max_connections = 3000

Current threads_connected = 296

Historic max_used_connections = 392

The number of used connections is 13% of the configured maximum.

Your max_connections variable seems to be fine.

INNODB STATUS

Current InnoDB index space = 8.57 G

Current InnoDB data space = 14.42 G

Current InnoDB buffer pool free = 56 %

Current innodb_buffer_pool_size = 20.00 G

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 : 38.60 G

Configured Max Per-thread Buffers : 139.81 G

Configured Max Global Buffers : 20.33 G

Configured Max Memory Limit : 160.14 G

Physical Memory : 47.15 G

Max memory limit exceeds 90% of physical memory

KEY BUFFER

Current MyISAM index space = 555 K

Current key_buffer_size = 245 M

Key cache miss rate is 1 : 14478

Key buffer free ratio = 81 %

Your key_buffer_size seems to be too high.

Perhaps you can use these resources elsewhere

QUERY CACHE

Query cache is enabled

Current query_cache_size = 64 M

Current query_cache_used = 17 K

Current query_cache_limit = 1 M

Current Query cache Memory fill ratio = .02 %

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 = 15 M

Current read_rnd_buffer_size = 16 M

Sort buffer seems to be fine

JOINS

Current join_buffer_size = 7.81 M

You have had 801 queries where a join could not use an index properly

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 = 28196 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 = 1024 tables

Current table_definition_cache = 256 tables

You have a total of 415 tables

You have 1024 open tables.

Current table_cache hit rate is 86%

, 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 = 512 M

Current tmp_table_size = 1.00 G

Of 2355076 temp tables, 2% were created on disk

Effective in-memory tmp_table_size is limited to max_heap_table_size.

Created disk tmp tables ratio seems fine

TABLE SCANS

Current read_buffer_size = 8 M

Current table scan ratio = 11 : 1

read_buffer_size seems to be fine

TABLE LOCKING

Current Lock Wait ratio = 1 : 144004850

Your table locking seems to be fine