自己寫的一個MYSQL監控show global status工具用於檢視指定時間內變化的指標

工具用於檢視指定時間內show global status指標的變化，能夠幫助運維人員瞭解系統負載的走勢
本工具在5.5 5.6 5.7中測試透過

原始碼我放在百度雲盤了

原始碼一共5個檔案
conmysql.c main.c findv.c other.c type.h

如果原始碼編譯使用如下方法
1、建立一個MYSQL使用者用於監控，不需要什麼許可權只要能夠show global status 即可
mysql> create user mmon@'localhost' identified by 'test123';
Query OK, 0 rows affected (0.30 sec)

2、找到你的MYSQL庫檔案
   一般在你的安裝目錄lib 目錄下
   如/mysqldata/mysql5.7/lib
   export LD_LIBRARY_PATH=/mysqldata/mysql5.7/lib
3、編譯原始檔
   原版
   gcc conmysql.c main.c findv.c other.c -L/mysqldata/mysql5.7/lib -L/mysqldata/mysql5.7/lib -lmysqlclient -I/mysqldata/mysql5.7/include -o mmon  -W -fPIC
   percona
   gcc conmysql.c main.c findv.c other.c -L/dbdata/mysql3307/lib  -lperconaserverclient -I/dbdata/mysql3307/include -o mmon  -W -fPIC
 
4、幫助
[root@testmy mysqlmon]# ./mmon -help
Welcome use this mon tool!
This mon tool is calc status delta!
Author:gaopeng QQ:22389860
This mon tool is calc status delta, interval time is paramter -l define default is 10 seconds
but cant's less than 3 seconds
-t define how many times defualt is 1440 times
If -10 appear means is that no values find!
Usage::./mmon -h -u -p -P/-s [-l] [-t]
-h:host
-u:username
-p:password
-P:port
-s:socket
-l:interval time of seconds
-t:how many times

-l 是時間間隔預設是10秒，指定時間最小為3秒，小於3秒會報錯。
-t 是你想取樣的此時預設是1440次，不能小於1.


5、使用
./mmon -h=localhost -u=test11 -p=gelc123 -s=/mysqldata/mysql5.7/mysqld3307.sock -l=5 -t=3

按ctrl+c 即可以退出

注意-p=lc1\$23 這裡的特殊字元用一下轉義\
輸出為：

Welcome use this mon tool!
This mon tool is calc status delta!
Author:gaopeng QQ:22389860
Your input paramter is: -h,localhost
Your input paramter is: -u,mmontest
Your input paramter is: -p,Lc123
Your input paramter is: -s,/dbdata/mysql5800/mysql.sock
Your input paramter is: -l,5
Your input paramter is: -t,3
Parameter counter is: 5
Mmonitor:host is:localhost,user is:mmontest,passwd is:gelc123,socket is:/dbdata/mysql5800/mysql.sock,port is 0
Mmonitor:Connect mysql server success
Mmonitor:status rows : 402,field : 2
------------------------------------------MMON--------------------------------------------
SysTime: Mon Sep 12 12:25:28 2016


Uptime:2312561    Connections:1       Aborted_clients:0       Max_used_connections:44      
--------------------------------------MYSQLINFO-------------------------------------------
Threads_connected:12          Threads_running:1           Qcache_free_memory:1031328      
Qcache_hits:0                 Qcache_not_cached:0         Qcache_inserts:0                
Handler_read_first:0          Handler_read_key71          Handler_read_next0             
Handler_read_last:0           Handler_read_prev:0         Handler_read_rnd:71             
Handler_read_rnd_next:403
Sort_rows:0                   Select_full_join:0          Select_scan:1                   
Com_commit:177                Com_rollback:0
Handler_commit:455            Handler_rollback:0
U:70      D:1       I:207     S:0       S/(U+D+I+S)(%):0.00    
TIM(temp table in mem lager)(%):100.00       SOD(sort on disk small)(%):0.00
TOH(table open hint lager)(%):100.00         BOD(binglog on disk samll)(%):0.00
--------------------------------------INNODBINFO------------------------------------------
Innodb_row_lock_time:0              Innodb_row_lock_waits:0
Innodb_log_writes:181               Innodb_log_waits:0
Innodb_buffer_pool_wait_free:0      Innodb_buffer_pool_pages_misc:380
Innodb_buffer_pool_pages_flushed:84
Innodb_dblwr_pages_written:84       Innodb_dblwr_writes:8
Innodb_os_log_pending_fsyncs:0      Innodb_os_log_pending_writes:0
Innodb_os_log_written:384512
Innodb_data_reads:21                Innodb_data_read:344064
Innodb_data_writes:273              Innodb_data_written:3137024
Innodb_buffer_pool_bytes_data:32071745536
U(rows):70      D(rows):1       I(rows):273     S(rows):71      
BPH(buffer cache hint)(%):100.00    BFP(free buffer pct)(%):0.42
BDP(dirty buffer pct)(%):0.68
---------------------------------------TOTALINFO------------------------------------------
Bytes_received:283146         Bytes_sent:11968
QPS:55        TPS:55        IOPS:96
---------------------------------------ENDL-----------------------------------------------


大部分保留了原有的status名字而沒有使用簡寫，目的在於大家能夠更快在文件中找到相應的解釋
明白其中的含義。

關於指標問題，任何show global status中的都可以非常簡單加入到工具中，可以聯絡我加入。

部分錯誤碼
Mmonitor(16):connect mysql server error
Mmonitor(15):mysql port is number type!" ??
Mmonitor:(14)parameters must -h -u -p -P -s [-l] "
Mmonitor:(13)parameter len must>=4"
Mmonitor(12):miss -parameter= ="
Mmonitor(11):use only -u -h -p -P -s [-l]"
Mmonitor(10):miss -parameter= -"
Mmonitor(17):data global status failed no pri?
Mmonitor(18):fetch data failed!"
Mmonitor(21): cycle is number type!"
Mmonitor(22): Mmonitor cycle must lager than 3 sec!

關於記憶體洩露：
透過工具 valgrind 檢測
==5999== HEAP SUMMARY:
==5999==     in use at exit: 51,863 bytes in 718 blocks
==5999==   total heap usage: 18,489 allocs, 17,771 frees, 2,250,709 bytes allocated
==5999== 
==5999== LEAK SUMMARY:
==5999==    definitely lost: 0 bytes in 0 blocks
==5999==    indirectly lost: 0 bytes in 0 blocks
==5999==      possibly lost: 34,651 bytes in 17 blocks
==5999==    still reachable: 17,212 bytes in 701 blocks
==5999==         suppressed: 0 bytes in 0 blocks
==5999== Rerun with --leak-check=full to see details of leaked memory
==5999== 
==5999== For counts of detected and suppressed errors, rerun with: -v


可以看到沒有記憶體洩露

==5999==      possibly lost: 34,651 bytes in 17 blocks
==5999==    still reachable: 17,212 bytes in 701 blocks

可以寫shell指令碼
是我固定非配的一點記憶體CTRL+C後釋放

如果寫指令碼可以如下：

export LD_LIBRARY_PATH=/dbdata/mysql3307/lib
DATE_TAG=`date +%Y%m%d`

int=1
 while(( $int<=288 ))
 do
 /root/mmon/mmon  -h=localhost -u=mmontest -p=gelc123 -s=/dbdata/mysql5800/mysql.sock -l=60 -t=5 >>/root/mmon/mmon_${DATE_TAG}.log
 let "int++"
 done

代表每次抽取為1分鐘 會取樣288*5=1440 次就是 剛好一天的。
1 00 * * * /root/mmon.sh

然後這樣掛載指令碼，就可以每天1分鐘取樣一次記錄下所有的資訊變化。