mysqltuner and mysqlreport 工具使用
1.2 mysqltuner.pl
本工具建议定期运行,发现目前MYSQL数据库存在的问题及修改相关的参数.
1.2.1 安装
直接下载
[root@even ~]# wget http://mysqltuner.pl/mysqltuner.pl
[root@even ~]# chmod +x mysqltuner.pl
[root@even ~]# cp mysqltuner.pl /home/mysql/
1.2.2 生成的报告如下
[root@xx xxx]# ./mysqltuner.pl
MySQLTuner 1.0.0 - Major Hayden [email protected]
Bug reports, feature requests, and downloads at http://mysqltuner.com/
Run with ‘–help’ for additional options and output filtering
[!!] Successfully authenticated with no password - SECURITY RISK!
-------- General Statistics --------------------------------------------------
[–] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.1.57-community-log
[OK] Operating on 64-bit architecture
-------- Storage Engine Statistics -------------------------------------------
[–] Status: -Archive -BDB -Federated +InnoDB -ISAM -NDBCluster
[–] Data in MyISAM tables: 18G (Tables: 3395)
[–] Data in MRG_MYISAM tables: 218M (Tables: 11)
[–] Data in InnoDB tables: 3G (Tables: 449)
[–] Data in MEMORY tables: 95M (Tables: 15)
[!!] Total fragmented tables: 188
-------- Performance Metrics -------------------------------------------------
[–] Up for: 8d 0h 22m 0s (7B q [10K qps], 3M conn, TX: 6131B, RX: 2280B)
[–] Reads / Writes: 62% / 38%
[–] Total buffers: 1.5G global + 96.2M per thread (1000 max threads)
[!!] Maximum possible memory usage: 95.5G (1226% of installed RAM)
[OK] Slow queries: 0% (8K/7B)
[!!] Highest connection usage: 100% (1001/1000)
[OK] Key buffer size / total MyISAM indexes: 512.0M/6.5G
[OK] Key buffer hit rate: 100.0% (6B cached / 301K reads)
[OK] Query cache efficiency: 99.2% (7B cached / 7B selects)
[!!] Query cache prunes per day: 6074
[OK] Sorts requiring temporary tables: 0% (2 temp sorts / 3M sorts)
[!!] Joins performed without indexes: 2029
[!!] Temporary tables created on disk: 33% (2M on disk / 7M total)
[OK] Thread cache hit rate: 99% (1K created / 3M connections)
[!!] Table cache hit rate: 0% (2K open / 222K opened)
[OK] Open file limit used: 35% (2K/8K)
[OK] Table locks acquired immediately: 97% (226M immediate / 230M locks)
[!!] InnoDB data size / buffer pool: 3.9G/256.0M
-------- Recommendations -----------------------------------------------------
General recommendations:
Run OPTIMIZE TABLE to defragment tables for better performance
Reduce your overall MySQL memory footprint for system stability
Reduce or eliminate persistent connections to reduce connection usage
Increasing the query_cache size over 128M may reduce performance
Adjust your join queries to always utilize indexes
Temporary table size is already large - reduce result set size
Reduce your SELECT DISTINCT queries without LIMIT clauses
Increase table_cache gradually to avoid file descriptor limits
Variables to adjust:
*** MySQL’s maximum memory usage is dangerously high ***
*** Add RAM before increasing MySQL buffer variables ***
max_connections (> 1000)
wait_timeout (< 3600)
interactive_timeout (< 3600)
query_cache_size (> 512M) [see warning above]
join_buffer_size (> 32.0M, or always use indexes with joins)
table_cache (> 2000)
innodb_buffer_pool_size (>= 3G)
分析本报告：
（１） 链接数要求１０００，每一个链接需要的内存是９５Ｍ左右，需要总的内存是９６g，目前本机的内存只有８Ｇ Highest connection usage: 100% (1001/1000)
建议链接数大于１０００，最大值是１００１
（２） Key buffer size / total MyISAM indexes: 512.0M/6.5G 建议调整成６.５Ｇ左右
（３） Temporary tables created on disk: 33% (2M on disk / 7M total) 说明了需要调整tmp_table_size大小的
（４） 系统整体建议的参数为：
max_connections (> 1000)
wait_timeout (< 3600)
interactive_timeout (< 3600)
query_cache_size (> 512M) [see warning above]
join_buffer_size (> 32.0M, or always use indexes with joins)
table_cache (> 2000)
innodb_buffer_pool_size (>= 3G
1.1 Mysqlreport
1.1.1 安装
下载地址
http://hackmysql.com/mysqlreport
Chmod 777 mysqlreport
./mysqlreport
1.1.2 使用
生成的报告如下
[root@xxx xxx]# ./mysqlreport --flush-status
Use of uninitialized value in multiplication (*) at ./mysqlreport line 829.
Use of uninitialized value in formline at ./mysqlreport line 1227.
MySQL 5.1.57-community- uptime 8 0:40:50 Wed Nov 13 10:08:06 2013
__ Key _________________________________________________________________
Buffer used 27.52M of 512.00M %Used: 5.37
Current 97.83M %Usage: 19.11
Write hit 99.55%
Read hit 100.00%
__ Questions ___________________________________________________________
Total 7.13G 10.3k/s
QC Hits 7.03G 10.1k/s %Total: 98.58
Com_ 6.82G 9.8k/s 95.69
-Unknown 6.81G 9.8k/s 95.52
DMS 85.78M 123.7/s 1.20
COM_QUIT 3.38M 4.9/s 0.05
Slow 1 s 8.44k 0.0/s 0.00 %DMS: 0.01 Log: ON
DMS 85.78M 123.7/s 1.20
SELECT 53.86M 77.6/s 0.76 62.79
DELETE 19.56M 28.2/s 0.27 22.81
INSERT 9.83M 14.2/s 0.14 11.46
UPDATE 1.64M 2.4/s 0.02 1.91
REPLACE 883.42k 1.3/s 0.01 1.03
Com_ 6.82G 9.8k/s 95.69
admin_comma 6.81G 9.8k/s 95.52
set_option 5.99M 8.6/s 0.08
change_db 3.19M 4.6/s 0.04
__ SELECT and Sort _____________________________________________________
Scan 3.93M 5.7/s %SELECT: 7.31
Range 8.95M 12.9/s 16.61
Full join 2.03k 0.0/s 0.00
Range check 0 0/s 0.00
Full rng join 48.99k 0.1/s 0.09
Sort scan 2.17M 3.1/s
Sort range 947.47k 1.4/s
Sort mrg pass 2 0.0/s
__ Query Cache _________________________________________________________
Memory usage 215.91M of 512.00M %Used: 42.17
Block Fragmnt 15.00%
Hits 7.03G 10.1k/s
Inserts 5.77M 8.3/s
Insrt:Prune 118.57:1 8.3/s
Hit:Insert 1217.91:1
__ Table Locks _________________________________________________________
Waited 4.68M 6.7/s %Total: 2.02
Immediate 226.55M 326.6/s
__ Tables ______________________________________________________________
Open 2000 of 2000 %Cache: 100.00
Opened 241.76k 0.3/s
__ Connections _________________________________________________________
Max used 1001 of 1000 %Max: 100.10
Total 3.38M 4.9/s
__ Created Temp ________________________________________________________
Disk table 2.45M 3.5/s
Table 4.85M 7.0/s Size: 256.0M
File 2.06k 0.0/s
__ Threads _____________________________________________________________
Running 2 of 781
Cached 21 of 500 %Hit: 99.96
Created 1.28k 0.0/s
Slow 0 0/s
__ Aborted _____________________________________________________________
Clients 8.91k 0.0/s
Connects 2.39k 0.0/s
__ Bytes _______________________________________________________________
Sent 6.14T 8.9M/s
Received 2.29T 3.3M/s
__ InnoDB Buffer Pool __________________________________________________
Usage 256.00M of 256.00M %Used: 100.00
Read hit 100.00%
Pages
Free 0 %Total: 0.00
Data 16.13k 98.45 %Drty: 0.00
Misc 254 1.55
Latched 0.00
Reads 5.26G 7.6k/s
From file 60.56k 0.1/s 0.00
Ahead Rnd 1001 0.0/s
Ahead Sql 1242 0.0/s
Writes 10.89M 15.7/s
Flushes 163.88k 0.2/s
Wait Free 0 0/s
__ InnoDB Lock _________________________________________________________
Waits 158 0.0/s
Current 0
Time acquiring
Total 401132 ms
Average 2538 ms
Max 21434 ms
__ InnoDB Data, Pages, Rows ____________________________________________
Data
Reads 71.09k 0.1/s
Writes 1.37M 2.0/s
fsync 1.30M 1.9/s
Pending
Reads 0
Writes 0
fsync 0
Pages
Created 8.49k 0.0/s
Read 169.24k 0.2/s
Written 163.88k 0.2/s
Rows
Deleted 237.02k 0.3/s
Inserted 255.62k 0.4/s
Read 1.77G 2.5k/s
Updated 180.99k 0.3/s