mysql sql慢查詢監控指令碼
阿新 • • 發佈：2020-10-09
1、修改my.cnf
#整體的效果，全域性開啟表和日誌檔案都寫，但是對於general_log只寫表，對於slow_query_log，表和日誌檔案都記錄。 general_log=1#開啟mysql執行sql的日誌 slow_query_log=1#開啟mysql慢sql的日誌 #設定之後會影響general_log和slow_query_log， log_output=table,File#日誌輸出會寫表，也會寫日誌檔案，為了便於程式去統計，所以最好寫表 #這裡沒配置general_log_file，那麼general_log就只會寫表了 #在mysql5.1.29以上，設定以下即可開啟mysql將執行的sql記錄在檔案中 #general_log_file=/log/general.log #5.1.29以以前為： #log=/var/lib/mysql/sql_row.log
long_query_time=1
#設定mysql的慢查詢為超過1s的查詢
slow_query_log_file=/log/slow.log
2、修改mysql的日誌表（在mysql庫中）的格式
#預設general_log是csv的格式，修改為MyISAM格式查詢效率會高很多
set global general_log = off;
alter table general_log engine = MyISAM;
set global general_log = on;
#預設slow_query_log是csv的格式，修改為MyISAM格式查詢效率會高很多
set global slow_query_log = off;等於0效果一樣
alter table slow_log engine = MyISAM;
set global slow_query_log = on;等於1效果一樣
3、因為mysql的日誌表：general_log和slow_query_log不允許修改，所以需要新建出一個便於刪除修改的表（這個日誌表太大，需要定期清理n天前得資料）
建立slow_log_dba的表
CREATE TABLE `slow_log_dba` ( `start_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `user_host` mediumtext NOT NULL, `query_time` time NOT NULL, `lock_time` time NOT NULL, `rows_sent` int(11) NOT NULL, `rows_examined` int(11) NOT NULL, `db` varchar(512) NOT NULL, `last_insert_id` int(11) NOT NULL, `insert_id` int(11) NOT NULL, `server_id` int(10) unsigned NOT NULL, `sql_text` mediumtext NOT NULL ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COMMENT='Slow log for dba';
建立general_log_dba的表
CREATE TABLE `general_log_dba` ( `event_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `user_host` mediumtext NOT NULL, `thread_id` int(11) NOT NULL, `server_id` int(10) unsigned NOT NULL, `command_type` varchar(64) NOT NULL, `argument` mediumtext NOT NULL, KEY `user_host` (`user_host`(200)), KEY `event_time` (`event_time`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COMMENT='general log for dba op';
4、因為程式最終使用的general_log_dba和slow_log_dba的表，所以需要定時的將general_log和slow_query_log的資料拷貝到general_log_dba和slow_log_dba之中
因為報告是每天生成一次，所以這個動作只要每天操作一次即可
#指令碼是儲存10天得資料，每天將general_log和slow_query_log的資料拷貝到general_log_dba和slow_log_dba之中
#做定時任務每天執行一次 mysqllogtable.sh
#!/bin/sh
NDaysAgo=$(date -d '-10 days' "+%F %H:%M:%S")
/usr/local/mysql/bin/mysql -uXXXX -p'xxxxxxxx' -D'mysql' -e "insert general_log_dba select * from general_log;
truncate general_log;
delete from general_log_dba where event_time < \"$NDaysAgo\";
insert slow_log_dba select * from slow_log;
truncate slow_log;
delete from slow_log_dba where start_time < \"$NDaysAgo\""
5、python指令碼寫統計每天sql操作和每天的mysql的慢查詢(指令碼中有部分是可以抽象的方法，請自己酌情處理)
統計mysql每日執行記錄的指令碼
# -*- coding: utf-8 -*- __author__ = 'river' import MySQLdb as mysql import re from datetime import datetime, timedelta import smtplib from email.mime.text import MIMEText def sendHtmlMail(mailcontent,myip): try: yestoday=(datetime.now()-timedelta(days=1)).strftime("%Y-%m-%d") sender = '[email protected]' receiver = ['[email protected]'] subject = myip+' mysql operation report '+yestoday smtpserver = 'smtp.exmail.xx.com' username = '[email protected]' password = 'xxxxx' msg = MIMEText(mailcontent,'html','utf-8')#'你好','text','utf-8' msg['Subject'] = subject msg['From'] = sender msg['To'] = '[email protected]' smtp = smtplib.SMTP() smtp.connect(smtpserver) smtp.login(username, password) smtp.sendmail(sender, receiver, msg.as_string()) smtp.quit() except Exception, e: print e,'send mail error' if __name__=='__main__': result=None htmlfile='mysqlLogMon.html' myiplist=['192.168.10.10','192.168.10.19'] yestoday=(datetime.now()-timedelta(days=1)).strftime("%Y-%m-%d 00:00:00") today=datetime.now().strftime("%Y-%m-%d 00:00:00") for myip in myiplist: sql="select user_host,argument from general_log_dba where event_time >='%s' and event_time <='%s'" %(yestoday,today) try: dbcon = mysql.connect(host=myip, user='xxxxx', passwd='xxxxx', db='mysql', port=3306,charset='utf8') cur = dbcon.cursor() print "step 1,"+myip+','+datetime.now().strftime("%Y-%m-%d %H:%M:%S") cur.execute(sql) result = cur.fetchall() cur.close() dbcon.close() except Exception, e: print e,'conn mysql error' user_host_set=set() print "step 2,"+myip+','+datetime.now().strftime("%Y-%m-%d %H:%M:%S") allhash={} if result: for user_host,argument in result: argument_delcom=re.compile(r'(\/\*(\s|.)*?\*\/)').sub("",argument).strip().replace(u"\x00",'').lower() if re.compile(r'^access.*').match(argument_delcom) or re.compile(r'^.*@.*on.*').match(argument_delcom) or re.compile(r'^grant.*').match(argument_delcom): tmpargument=argument_delcom.strip() else: tmpargument=argument_delcom.split(' ')[0].strip() if len(tmpargument)>30: #有些sql是u'select\n\t\t\t\t\tcount(m.enquirymainid)'，可以使用print repr(tmpargument) tmpargument=argument_delcom.split('\n')[0].strip() #如果全是註釋，那麼就不統計這條目了 if not tmpargument or tmpargument.strip()=='' or tmpargument.strip()==' ': continue if allhash.has_key(user_host): allhash[user_host][tmpargument]=allhash[user_host].get(tmpargument,0)+1 else: allhash[user_host]={tmpargument:1} print "step 3,"+myip+','+datetime.now().strftime("%Y-%m-%d %H:%M:%S") headhtml=''' ''' print "step 4,"+myip+','+datetime.now().strftime("%Y-%m-%d %H:%M:%S") with open(htmlfile,'w') as htmlfileobj: htmlfileobj.write(headhtml) htmlfileobj.flush() print "step 5,"+myip+','+datetime.now().strftime("%Y-%m-%d %H:%M:%S") with open(htmlfile,'a') as htmlfileobj: for hostkey in allhash.keys(): listtmp=sorted(allhash[hostkey].iteritems(),key=lambda labkey:labkey[1],reverse=True) rowspan=len(allhash[hostkey]) #htmlfileobj.write() tmpline='' %(rowspan,hostkey.encode('utf-8')) htmlfileobj.write(tmpline) countn=0 for runsql,count in listtmp: if countn==0: tmpline='' %(runsql.encode('utf-8'),count) else: tmpline='' %(runsql.encode('utf-8'),count) countn+=1 htmlfileobj.write(tmpline) tmpline=''' 使用者 執行sql 執行次數 %s %s %s %s %s ''' htmlfileobj.write(tmpline) with open(htmlfile,'r') as htmlfileobj: mailcontent=htmlfileobj.read() sendHtmlMail(mailcontent,myip) else: print 'sql result is None,exit ing' print "step 6,"+myip+','+datetime.now().strftime("%Y-%m-%d %H:%M:%S")
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