author：skate
time：2012/02/17
mysqlsla的安裝與使用
1.下載 mysqlsla
[root@localhost tmp]# wget http://hackmysql.com/scripts/mysqlsla-2.03.tar.gz
--19:45:45-- http://hackmysql.com/scripts/mysqlsla-2.03.tar.gz
Resolving hackmysql.com... 64.13.232.157
Connecting to hackmysql.com|64.13.232.157|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 33674 (33K) [application/x-tar]
Saving to: `mysqlsla-2.03.tar.gz.2'
100%[===========================================================================================>] 33,674 50.2K/s in 0.7s
19:45:47 (50.2 KB/s) - `mysqlsla-2.03.tar.gz.2' saved [33674/33674]
2.解壓
[root@localhost tmp]# tar -zxvf mysqlsla-2.03.tar.gz
mysqlsla-2.03/
mysqlsla-2.03/Changes
mysqlsla-2.03/INSTALL
mysqlsla-2.03/README
mysqlsla-2.03/Makefile.PL
mysqlsla-2.03/bin/
mysqlsla-2.03/bin/mysqlsla
mysqlsla-2.03/META.yml
mysqlsla-2.03/lib/
mysqlsla-2.03/lib/mysqlsla.pm
mysqlsla-2.03/MANIFEST
[root@localhost tmp]# cd mysqlsla-2.03
[root@localhost mysqlsla-2.03]# ls
bin Changes INSTALL lib Makefile.PL MANIFEST META.yml README
3.執行perl腳本檢查包依賴關系
[root@localhost mysqlsla-2.03]# perl Makefile.PL
Checking if your kit is complete...
Looks good
Writing Makefile for mysqlsla
4.安裝
[root@localhost mysqlsla-2.03]# make && make install;
cp lib/mysqlsla.pm blib/lib/mysqlsla.pm
cp bin/mysqlsla blib/script/mysqlsla
/usr/bin/perl "-MExtUtils::MY" -e "MY->fixin(shift)" blib/script/mysqlsla
Manifying blib/man3/mysqlsla.3pm
Installing /usr/lib/perl5/site_perl/5.8.8/mysqlsla.pm
Installing /usr/share/man/man3/mysqlsla.3pm
Installing /usr/bin/mysqlsla
Writing /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi/auto/mysqlsla/.packlist
Appending installation info to /usr/lib/perl5/5.8.8/i386-linux-thread-multi/perllocal.pod
[root@localhost mysqlsla-2.03]#
5.簡單使用
語法：
Slow log: mysqlsla -lt slow slow.log
General log: mysqlsla -lt general general.log
Binary log: mysqlbinlog bin.log | mysqlsla -lt binary -
這裡以slow log為例：
[root@localhost mysqlsla-2.03]# mysqlsla -lt slow /tmp/127_slow.log | more
Report for slow logs: /tmp/127_slow.log
24 queries total, 6 unique
Sorted by 't_sum'
Grand Totals: Time 16 s, Lock 1 s, Rows sent 18, Rows Examined 2.10M
______________________________________________________________________ 001 ___
Count : 18 (75.00%)
Time : 15 s total, 833.333 ms avg, 0 to 8 s max (93.75%)
95% of Time : 7 s total, 411.765 ms avg, 0 to 4 s max
Lock Time (s) : 0 total, 0 avg, 0 to 0 max (0.00%)
95% of Lock : 0 total, 0 avg, 0 to 0 max
Rows sent : 0 avg, 0 to 0 max (0.00%)
Rows examined : 116.51k avg, 8 to 1.05M max (99.99%)
Database :
Users :
root@localhost : 100.00% (18) of query, 100.00% (24) of all users
Query abstract:
INSERT INTO t2 SELECT * FROM t2;
Query sample:
insert into t2 select * from t2;
........
選項說明：
總查詢次數 (queries total)， 去重後的sql數量 (unique)
輸出報表的內容排序(sorted by)
最重大的慢sql統計信息, 包括 平均執行時間, 等待鎖時間, 結果行的總數, 掃描的行總數.
Count, sql的執行次數及占總的slow log數量的百分比.
Time, 執行時間, 包括總時間, 平均時間, 最小, 最大時間, 時間占到總慢sql時間的百分比.
95% of Time, 去除最快和最慢的sql, 覆蓋率占95%的sql的執行時間.
Lock Time, 等待鎖的時間.
95% of Lock , 95%的慢sql等待鎖時間.
Rows sent, 結果行統計數量, 包括平均, 最小, 最大數量.
Rows examined, 掃描的行數量.
Database, 屬於哪個數據庫
Users, 哪個用戶,IP, 占到所有用戶執行的sql百分比
Query abstract, 抽象後的sql語句
Query sample, sql語句
mysqlsla常用參數說明：
1) -log-type (-lt) type logs:
通過這個參數來制定log的類型，主要有slow, general, binary, msl, udl,分析slow log時通過制定為slow.
2) -sort:
制定使用什麼參數來對分析結果進行排序，默認是按照t_sum來進行排序。
t_sum:按總時間排序
c_sum:按總次數排序
c_sum_p: sql語句執行次數占總執行次數的百分比。
3) -top:
顯示sql的數量，默認是10,表示按規則取排序的前多少條
4) –statement-filter (-sf) [+-][TYPE]:
過濾sql語句的類型，比如select、update、drop.
[TYPE]有SELECT, CREATE, DROP, UPDATE, INSERT，例如"+SELECT,INSERT"，不出現的默認是-，即不包括。
5) db：要處理哪個庫的日志：
例如，只取backup庫的select語句、按c_sum_p排序的前2條記錄
[root@localhost mysqlsla-2.03]# mysqlsla -lt slow -sort c_sum_p -sf "+select" -db backup -top 2 /tmp/127_slow.log
Report for slow logs: /tmp/127_slow.log
4 queries total, 3 unique
Sorted by 'c_sum_p'
Grand Totals: Time 1 s, Lock 1 s, Rows sent 18, Rows Examined 195
______________________________________________________________________ 001 ___
Count : 2 (50.00%)
Time : 0 total, 0 avg, 0 to 0 max (0.00%)
Lock Time (s) : 0 total, 0 avg, 0 to 0 max (0.00%)
Rows sent : 1 avg, 1 to 1 max (11.11%)
Rows examined : 86 avg, 77 to 94 max (87.69%)
Database :
Users :
root@localhost : 100.00% (2) of query, 100.00% (4) of all users
Query abstract:
SELECT SUM(format(duration,N)) AS duration FROM information_schema.profiling WHERE query_id=N;
Query sample:
select sum(format(duration,6)) as duration from information_schema.profiling where query_id=7;
______________________________________________________________________ 002 ___
Count : 1 (25.00%)
Time : 1 s total, 1 s avg, 1 s to 1 s max (100.00%)
Lock Time (s) : 1 s total, 1 s avg, 1 s to 1 s max (100.00%)
Rows sent : 4 avg, 4 to 4 max (22.22%)
Rows examined : 12 avg, 12 to 12 max (6.15%)
Database :
Users :
root@localhost : 100.00% (1) of query, 100.00% (4) of all users
Query abstract:
SELECT * FROM tt WHERE a=N;
Query sample:
select * from tt where a=2;
[root@localhost mysqlsla-2.03]#
[root@localhost mysqlsla-2.03]#
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