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本帖最后由 todayhero 于 2011-05-18 17:01 编辑
硬件配置:
DELL 2850 8G内存.
情况:经常出现MYSQL锁死的情况,导致大量select堆积,最后无法服务,目前的解决办法,是写了一个监控脚本,10S运行一次,发现问题后,就自动kill到select语句.临时解决问题.
mysqladmin status状态
Uptime: 129365 Threads: 38 Questions: 44113207 Slow queries: 27382 Opens: 2038 Flush tables: 27 Open tables: 492 Queries per second avg: 340.998
MYSQL5.1目前使用的MYISAM.
使用myisam update会导致锁表,然后select堆积严重.
改为INNODB后.SELECT执行效率非常地低.服务器负载过重,load值都保持在10左右.
鉴于上面的情况.还用MYISAM还好些.
解决办法:我认为使用memcached缓存数据.
+---------+------------------+---------------------+-------+-------------+--------+-------------------------------------------------
----------------------+------------------------------------------------------------------------------------------------------+
| Id | User | Host | db | Command | Time | State
| Info |
+---------+------------------+---------------------+-------+-------------+--------+-------------------------------------------------
----------------------+------------------------------------------------------------------------------------------------------+
| 1 | system user | | | Connect | 114038 | Waiting for master to send event
| |
| 2 | system user | | | Connect | 20 | Has read all relay log; waiting for the slave I/
O thread to update it | |
| 3 | replication_user | 192.168.1.103:39614 | | Binlog Dump | 114038 | Has sent all binlog to slave; waiting for binlog
to be updated | |
| 1051074 | root | 124.0.5.1:15364 | | Sleep | 3765 |
| |
| 1051101 | root | 124.0.5.1:15365 | go.cn | Sleep | 1228 |
| |
| 1051592 | root | 124.0.5.1:15367 | go.cn | Sleep | 2165 |
| |
| 1067124 | root | 124.0.5.1:15532 | go.cn | Sleep | 2159 |
| |
| 1091673 | root | 124.0.5.1:15806 | go.cn | Sleep | 1225 |
| |
| 1109945 | ktx | 192.168.1.105:19561 | go.cn | Query | 20 | Locked
| INSERT INTO jd_adminlog SET adminname='xijing', operate='/admin.php?m=oders&app=list', ip= |
| 1109966 | ktx | 192.168.1.105:19575 | go.cn | Query | 20 | update
| INSERT INTO jd_adminlog SET adminname='xijing', operate='/admin.php?m=oders&app=list', ip= |
| 1109989 | ktx | 192.168.1.105:19588 | go.cn | Query | 18 | Locked
| INSERT INTO jd_adminlog SET adminname='xijing', operate='/admin.php?m=oders&app=list', ip= |
| 1110067 | ktx | 192.168.1.104:64849 | go.cn | Query | 20 | end
| UPDATE jd_order SET is_pay='1',is_suss='1',paytime=1305690269 WHERE orderid='803937' AND uid='80 |
| 1110133 | ktx | 192.168.1.105:19695 | go.cn | Query | 20 | Locked
| UPDATE jd_group SET bought=bought+1,goodsnum=goodsnum-1 WHERE gid='2483' |
| 1110134 | ktx | 192.168.1.105:19697 | go.cn | Query | 20 | Locked
| SELECT * FROM jd_order WHERE is_pay=1 AND uid ='2' |
| 1110136 | ktx | 192.168.1.107:64925 | go.cn | Query | 20 | Locked
| SELECT * FROM jd_order WHERE uid='801449' AND gid=1913 AND is_pay=1 |
| 1110147 | ktx | 192.168.1.105:19710 | go.cn | Query | 20 | Locked
| SELECT a.*,b.gid,b.goodsname,b.miniurl,b.endtime,b.goodsnum,b.sussessnum,b.bought,b.ptypeid FROM jiu |
| 1110184 | ktx | 192.168.1.105:19733 | go.cn | Query | 20 | Locked
| SELECT * FROM jd_order WHERE is_pay=1 AND uid ='2' |
| 1110221 | ktx | 192.168.1.107:64978 | go.cn | Query | 20 | Locked
| SELECT a.*,b.gid,b.goodsname,b.miniurl,b.endtime,b.goodsnum,b.sussessnum,b.bought,b.ptypeid FROM jiu |
| 1110228 | ktx | 192.168.1.105:19758 | go.cn | Query | 20 | Locked
| SELECT a.*,b.gid,b.goodsname,b.miniurl,b.endtime,b.goodsnum,b.sussessnum,b.bought,b.ptypeid FROM jiu |
| 1110232 | ktx | 192.168.1.105:19761 | go.cn | Query | 20 | Locked
| SELECT * FROM jd_order WHERE uid='468193' AND gid=2437 AND is_pay=1 |
| 1110250 | ktx | 192.168.1.105:19774 | go.cn | Query | 20 | Locked
| SELECT SQL_BUFFER_RESULT gid,ptypeid,Delivery,cityid,goodsname,miniurl,imgdir,goodspic,thumbnail,rsi |
| 1110265 | ktx | 192.168.1.107:5023 | go.cn | Query | 20 | Locked
| SELECT SQL_BUFFER_RESULT * FROM jd_group WHERE gid='1799' |
| 1110277 | ktx | 192.168.1.105:19792 | go.cn | Query | 18 | Locked
| SELECT a.conpwd,a.couponsid,a.couponinfo,a.orderid,a.addtime,a.indate,c.gid,c.goodsname,c.miniurl,d. |
| 1110280 | ktx | 192.168.1.104:64974 | go.cn | Query | 18 | Locked
| SELECT a.*,b.gid,b.goodsname,b.miniurl,b.endtime,b.goodsnum,b.sussessnum,b.bought,b.ptypeid FROM jiu |
| 1110281 | ktx | 192.168.1.107:5037 | go.cn | Query | 18 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2279' |
| 1110283 | ktx | 192.168.1.105:19794 | go.cn | Query | 18 | Locked
| SELECT a.*,b.gid,b.goodsname,b.miniurl,b.endtime,b.goodsnum,b.sussessnum,b.bought,b.ptypeid FROM jiu |
| 1110284 | ktx | 192.168.1.105:19796 | go.cn | Query | 18 | Locked
| select * from jd_group where gid=2403 |
| 1110286 | ktx | 192.168.1.107:5041 | go.cn | Query | 18 | Locked
| SELECT gid,bought,isrel,sustime,residue,endtime,starttime FROM jd_group WHERE gid=2207 |
| 1110289 | ktx | 192.168.1.105:19800 | go.cn | Query | 18 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2519' |
| 1110292 | ktx | 192.168.1.105:19802 | go.cn | Query | 18 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2585' |
| 1110295 | ktx | 192.168.1.105:19804 | go.cn | Query | 18 | Locked
| select goodsnum from jd_group where gid=2207 |
| 1110296 | ktx | 192.168.1.104:64980 | go.cn | Query | 17 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2545' |
| 1110303 | ktx | 192.168.1.107:5056 | go.cn | Query | 17 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2605' |
| 1110304 | ktx | 192.168.1.104:64988 | go.cn | Query | 18 | Locked
| SELECT gid,bought,isrel,sustime,residue,endtime,starttime FROM jd_group WHERE gid=2605 |
| 1110305 | ktx | 192.168.1.104:64990 | go.cn | Query | 17 | Locked
| SELECT a.*,b.saleprice,b.ptypeid,b.cityid,b.goodsname,b.howusecoup FROM jd_order a LEFT JOIN ji |
| 1110306 | ktx | 192.168.1.104:64992 | go.cn | Query | 18 | Locked
| SELECT sql_buffer_result a.gid,a.ptypeid,a.Delivery,a.hot_area,a.cityid,a.supplierid,a.goodsname,a.m |
| 1110308 | ktx | 192.168.1.105:19808 | go.cn | Query | 18 | Locked
| SELECT gid,bought,isrel,sustime,residue,endtime,starttime FROM jd_group WHERE gid=1913 |
| 1110311 | ktx | 192.168.1.104:64994 | go.cn | Query | 18 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2523' |
| 1110312 | ktx | 192.168.1.105:19812 | go.cn | Query | 18 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2541' |
| 1110314 | ktx | 192.168.1.104:64996 | go.cn | Query | 17 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2135' |
| 1110315 | ktx | 192.168.1.104:64998 | go.cn | Query | 17 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2199' |
| 1110316 | ktx | 192.168.1.105:19815 | go.cn | Query | 18 | Locked
| SELECT sql_buffer_result a.*,b.* FROM jd_group a LEFT JOIN jd_supplier b ON a.supplierid=b.s |
| 1110317 | ktx | 192.168.1.105:19816 | go.cn | Query | 18 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2513' |
| 1110320 | ktx | 192.168.1.104:5001 | go.cn | Query | 18 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2465' |
| 1110321 | ktx | 192.168.1.107:5062 | go.cn | Query | 17 | Locked
| SELECT sql_buffer_result a.gid,a.ptypeid,a.Delivery,a.hot_area,a.cityid,a.supplierid,a.goodsname,a.m |
| 1110324 | ktx | 192.168.1.104:5003 | go.cn | Query | 18 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2563' |
| 1110330 | ktx | 192.168.1.107:5068 | go.cn | Query | 17 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='1913' |
| 1110331 | ktx | 192.168.1.104:5010 | go.cn | Query | 18 | Locked
| select goodsnum from jd_group where gid=2471 |
| 1110332 | ktx | 192.168.1.105:19824 | go.cn | Query | 17 | Locked
| SELECT * FROM jd_order WHERE orderid='803899' |
| 1110334 | ktx | 192.168.1.107:5070 | go.cn | Query | 18 | Locked
| SELECT Delivery,endtime,starttime,browsable FROM jd_group WHERE gid='2465' |
| 1110337 | ktx | 192.168.1.104:5014 | go.cn | Query | 20 | Locked
| SELECT sql_buffer_result a.*,b.* FROM jd_group a LEFT JOIN jd_supplier b ON a.supplierid=b.s |
| 1110336 | ktx | 192.168.1.105:19826 | go.cn | Query | 20 | Locked
| SELECT sql_buffer_result a.*,b.* FROM jd_group a LEFT JOIN jd_supplier b ON a.supplierid=b.s |
| 1110339 | ktx | 192.168.1.107:5074 | go.cn | Query | 20 | Locked
| SELECT sql_buffer_result a.*,b.* FROM jd_group a LEFT JOIN jd_supplier b ON a.supplierid=b.s |
| 1110338 | ktx | 192.168.1.107:5073 | go.cn | Query | 20 | Locked
| SELECT sql_buffer_result a.*,b.* FROM jd_group a LEFT JOIN jd_supplier b ON a.supplierid=b.s |
| 1110340 | ktx | 192.168.1.104:5016 | go.cn | Query | 20 | Locked
| SELECT sql_buffer_result a.*,b.* FROM jd_group a LEFT JOIN jd_supplier b ON a.supplierid=b.s |
| 1110341 | ktx | 192.168.1.104:5018 | go.cn | Query | 20 | Locked
| SELECT sql_buffer_result a.*,b.* FROM jd_group a LEFT JOIN jd_supplier b ON a.supplierid=b.s |
| 1110342 | ktx | 192.168.1.104:5020 | go.cn | Query | 20 | Locked
| SELECT sql_buffer_result a.*,b.* FROM jd_group a LEFT JOIN jd_supplier b ON a.supplierid=b.s |
| |
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