MySQL更新陷入困境_Mysql_Locking

MySQL更新陷入困境

mysql

MySQL更新陷入困境,mysql,locking,Mysql,Locking,我有一个基于Mediacore的网站，由于更新查询而陷入困境。这些更新查询一直在运行，但有时（我相信，在高流量时段），其中一个更新会卡住，锁定所有其他查询： 245 mediacore_user localhost mediacore Query 36 Locked UPDATE media SET modified_on='2011-12-21 09:42:58', views=(media.views + 1) WHERE media.id = 1048

我有一个基于Mediacore的网站，由于更新查询而陷入困境。这些更新查询一直在运行，但有时（我相信，在高流量时段），其中一个更新会卡住，锁定所有其他查询：

245     mediacore_user  localhost   mediacore   Query   36  Locked      UPDATE media SET modified_on='2011-12-21 09:42:58', views=(media.views + 1) WHERE media.id = 1048 
246     mediacore_user  localhost   mediacore   Query   36  Locked      UPDATE media SET modified_on='2011-12-21 09:42:58', views=(media.views + 1) WHERE media.id = 1048 
248     mediacore_user  localhost   mediacore   Query   36  Updating    UPDATE media SET modified_on='2011-12-21 09:42:58', views=(media.views + 1) WHERE media.id = 1048 
249     mediacore_user  localhost   mediacore   Query   36  Locked      UPDATE media SET modified_on='2011-12-21 09:42:58', views=(media.views + 1) WHERE media.id = 1048 
253     mediacore_user  localhost   mediacore   Query   36  Locked      UPDATE media SET modified_on='2011-12-21 09:42:58', views=(media.views + 1) WHERE media.id = 1048 
258     mediacore_user  localhost   mediacore   Query   30  Locked      UPDATE media SET modified_on='2011-12-21 09:43:04', views=(media.views + 1) WHERE media.id = 416 
268     mediacore_user  localhost   mediacore   Query   3   Locked      UPDATE media SET modified_on='2011-12-21 09:43:31', views=(media.views + 1) WHERE media.id = 1048 
269     mediacore_user  localhost   mediacore   Query   3   Locked      UPDATE media SET modified_on='2011-12-21 09:43:31', views=(media.views + 1) WHERE media.id = 1048 
270     mediacore_user  localhost   mediacore   Query   3   Locked      UPDATE media SET modified_on='2011-12-21 09:43:31', views=(media.views + 1) WHERE media.id = 1048 
271     mediacore_user  localhost   mediacore   Query   3   Locked      UPDATE media SET modified_on='2011-12-21 09:43:31', views=(media.views + 1) WHERE media.id = 1048 
272     mediacore_user  localhost   mediacore   Query   1   Locked      UPDATE media SET modified_on='2011-12-21 09:43:33', views=(media.views + 1) WHERE media.id = 1048

如果我关闭了“更新”连接，另一个会被卡住，依此类推，直到只剩下大约3个查询被锁定

有什么想法吗

媒体表：

CREATE TABLE `media` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `type` varchar(8) DEFAULT NULL,
  `slug` varchar(50) NOT NULL,
  `podcast_id` int(11) DEFAULT NULL,
  `reviewed` tinyint(1) NOT NULL,
  `encoded` tinyint(1) NOT NULL,
  `publishable` tinyint(1) NOT NULL,
  `created_on` datetime NOT NULL,
  `modified_on` datetime NOT NULL,
  `publish_on` datetime DEFAULT NULL,
  `publish_until` datetime DEFAULT NULL,
  `title` varchar(255) NOT NULL,
  `subtitle` varchar(255) DEFAULT NULL,
  `description` text,
  `description_plain` text,
  `notes` text,
  `duration` int(11) NOT NULL,
  `views` int(11) NOT NULL,
  `likes` int(11) NOT NULL,
  `popularity_points` int(11) NOT NULL,
  `author_name` varchar(50) NOT NULL,
  `author_email` varchar(255) NOT NULL,
  `dislikes` int(11) NOT NULL,
  `popularity_likes` int(11) NOT NULL,
  `popularity_dislikes` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `slug` (`slug`),
  KEY `podcast_id` (`podcast_id`),
  CONSTRAINT `media_ibfk_1` FOREIGN KEY (`podcast_id`) REFERENCES `podcasts` (`id`) ON DELETE SET NULL ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=1049 DEFAULT CHARSET=utf8

问题发生后的INNODB状态：

=====================================
111221 12:12:09 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 6 seconds
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 78, signal count 78
Mutex spin waits 0, rounds 453, OS waits 17
RW-shared spins 122, OS waits 61; RW-excl spins 0, OS waits 0
------------
TRANSACTIONS
------------
Trx id counter 0 1115749
Purge done for trx's n:o < 0 1115735 undo n:o < 0 0
History list length 13
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 0 1115747, not started, process no 15360, OS thread id 140486827099904
MySQL thread id 111, query id 11647 localhost mediacore_user
---TRANSACTION 0 0, not started, process no 15360, OS thread id 140486827898624
MySQL thread id 106, query id 11651 localhost root
show innodb status
---TRANSACTION 0 1115709, not started, process no 15360, OS thread id 140486826567424
MySQL thread id 103, query id 10874 localhost mediacore_user
---TRANSACTION 0 1115731, not started, process no 15360, OS thread id 140486792349440
MySQL thread id 102, query id 11517 localhost mediacore_user
---TRANSACTION 0 1115668, not started, process no 15360, OS thread id 140486792881920
MySQL thread id 101, query id 10067 localhost 127.0.0.1 a7user
---TRANSACTION 0 1115737, not started, process no 15360, OS thread id 140486791816960
MySQL thread id 95, query id 11578 localhost mediacore_user
---TRANSACTION 0 1115738, not started, process no 15360, OS thread id 140486827366144
MySQL thread id 87, query id 11577 localhost mediacore_user
---TRANSACTION 0 1115744, not started, process no 15360, OS thread id 140486827632384
MySQL thread id 61, query id 11606 localhost mediacore_user
---TRANSACTION 0 1115746, not started, process no 15360, OS thread id 140486826301184
MySQL thread id 22, query id 11633 localhost mediacore_user
---TRANSACTION 0 1115748, ACTIVE 1 sec, process no 15360, OS thread id 140486826833664
mysql tables in use 1, locked 1
MySQL thread id 55, query id 11650 localhost mediacore_user Table lock
UPDATE media SET modified_on='2011-12-21 12:12:08', dislikes=10 WHERE media.id = 572
Trx read view will not see trx with id >= 0 1115749, sees < 0 1115740
---TRANSACTION 0 1115743, ACTIVE 14 sec, process no 15360, OS thread id 140486826034944
mysql tables in use 1, locked 1
MySQL thread id 23, query id 11601 localhost mediacore_user Table lock
UPDATE media SET modified_on='2011-12-21 12:11:55', views=(media.views + 1) WHERE media.id = 1048
Trx read view will not see trx with id >= 0 1115744, sees < 0 1115740
---TRANSACTION 0 1115742, ACTIVE 14 sec, process no 15360, OS thread id 140486825502464
mysql tables in use 1, locked 1
MySQL thread id 90, query id 11599 localhost mediacore_user Table lock
UPDATE media SET modified_on='2011-12-21 12:11:55', views=(media.views + 1) WHERE media.id = 1048
Trx read view will not see trx with id >= 0 1115743, sees < 0 1115740
---TRANSACTION 0 1115741, ACTIVE 14 sec, process no 15360, OS thread id 140486825768704 starting index read
mysql tables in use 1, locked 1
LOCK WAIT 2 lock struct(s), heap size 368, 1 row lock(s)
MySQL thread id 73, query id 11596 localhost mediacore_user Updating
UPDATE media SET modified_on='2011-12-21 12:11:55', views=(media.views + 1) WHERE media.id = 1048
Trx read view will not see trx with id >= 0 1115742, sees < 0 1115740
------- TRX HAS BEEN WAITING 14 SEC FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 0 page no 1025 n bits 88 index `PRIMARY` of table `mediacore`.`media` trx id 0 1115741 lock_mode X locks rec but not gap waiting
Record lock, heap no 20 PHYSICAL RECORD: n_fields 27; compact format; info bits 0
 0: len 4; hex 80000418; asc     ;; 1: len 6; hex 00000011065c; asc      \;; 2: len 7; hex 00000003c20d5b; asc       [;; 3: len 5; hex 766964656f; asc video;; 4: len 30; hex 617273656c696f2d7061746f2d64652d63617276616c686f2d686f6d656e; asc arselio-pato-de-carvalho-homen;...(truncated); 5: len 4; hex 80000013; asc     ;; 6: len 1; hex 81; asc  ;; 7: len 1; hex 81; asc  ;; 8: len 1; hex 81; asc  ;; 9: len 8; hex 8000124a82217b0b; asc    J !{ ;; 10: len 8; hex 8000124a8230e083; asc    J 0  ;; 11: len 8; hex 8000124a82220ef0; asc    J "  ;; 12: SQL NULL; 13: len 30; hex 417273c3a96c696f205061746f2064652043617276616c686f20686f6d65; asc Ars  lio Pato de Carvalho home;...(truncated); 14: SQL NULL; 15: len 30; hex 3c703e43656e74726f206465204e6575726f6369c3aa6e63696173206520; asc <p>Centro de Neuroci  ncias e ;...(truncated); 16: len 30; hex 43656e74726f206465204e6575726f6369c3aa6e6369617320652042696f; asc Centro de Neuroci  ncias e Bio;...(truncated); 17: SQL NULL; 18: len 4; hex 80000000; asc     ;; 19: len 4; hex 80000099; asc     ;; 20: len 4; hex 80000000; asc     ;; 21: len 4; hex 80000000; asc     ;; 22: len 3; hex 554356; asc UCV;; 23: len 9; hex 7563764075632e7074; asc ucv@uc.pt;; 24: len 4; hex 80000000; asc     ;; 25: len 4; hex 80000000; asc     ;; 26: len 4; hex 80000000; asc     ;;

------------------
---TRANSACTION 0 1115740, ACTIVE 14 sec, process no 15360, OS thread id 140486792083200
2 lock struct(s), heap size 368, 1 row lock(s), undo log entries 1
MySQL thread id 97, query id 11597 localhost mediacore_user Table lock
SELECT 1 
FROM media_fulltext 
 LIMIT 1
Trx read view will not see trx with id >= 0 1115741, sees < 0 1115741
--------
FILE I/O
--------
I/O thread 0 state: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (write thread)
Pending normal aio reads: 0, aio writes: 0,
 ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0
Pending flushes (fsync) log: 0; buffer pool: 0
187 OS file reads, 469 OS file writes, 298 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 0, seg size 2,
0 inserts, 0 merged recs, 0 merges
Hash table size 2212699, node heap has 9 buffer(s)
0.17 hash searches/s, 0.17 non-hash searches/s
---
LOG
---
Log sequence number 0 148655397
Log flushed up to   0 148655397
Last checkpoint at  0 148655397
0 pending log writes, 0 pending chkp writes
177 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total memory allocated 1225697720; in additional pool allocated 11846912
Dictionary memory allocated 203840
Buffer pool size   65536
Free buffers       65299
Database pages     228
Modified db pages  0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages read 225, created 3, written 259
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 1000 / 1000
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
6 read views open inside InnoDB
Main thread process no. 15360, id 140486801540864, state: sleeping
Number of rows inserted 13, updated 85, deleted 2, read 281971
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.17 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================

=====================================
111221 12:12:09 INNODB监视器输出
=====================================
从最后6秒计算的每秒平均值
----------
信号量
----------
OS等待阵列信息：保留计数78，信号计数78
互斥旋转等待0次，轮数453次，操作系统等待17次
RW共享自旋122，OS等待61；RW excl旋转0，操作系统等待0
------------
交易
------------
Trx id计数器0 1115749
清除trx的n:o<0 1115735撤消n:o<0
历史记录列表长度13
每个会话的事务列表：
---事务0 1115747，未启动，进程号15360，操作系统线程id 140486827099904
MySQL线程id 111，查询id 11647 localhost mediacore\u用户
---事务0，未启动，进程号15360，操作系统线程id 140486827898624
MySQL线程id 106，查询id 11651 localhost root
显示innodb状态
---事务0 1115709，未启动，进程号15360，操作系统线程id 140486826567424
MySQL线程id 103，查询id 10874 localhost mediacore\u用户
---事务0 1115731，未启动，进程号15360，操作系统线程id 140486792349440
MySQL线程id 102，查询id 11517 localhost mediacore\u用户
---事务0 1115668，未启动，进程号15360，操作系统线程id 140486792881920
MySQL线程id 101，查询id 10067 localhost 127.0.0.1 a7user
---事务0 1115737，未启动，进程号15360，操作系统线程id 140486791816960
MySQL线程id 95，查询id 11578 localhost mediacore\u用户
---事务0 1115738，未启动，进程号15360，操作系统线程id 140486827366144
MySQL线程id 87，查询id 11577 localhost mediacore\u用户
---事务0 1115744，未启动，进程号15360，操作系统线程id 140486827632384
MySQL线程id 61，查询id 11606 localhost mediacore\u用户
---事务0 1115746，未启动，进程号15360，操作系统线程id 140486826301184
MySQL线程id 22，查询id 11633 localhost mediacore\u用户
---事务0 1115748，活动1秒，进程号15360，操作系统线程id 140486826833664
mysql表正在使用1，已锁定1
MySQL线程id 55，查询id 11650 localhost mediacore\u用户表锁
更新媒体集修改时间：2011-12-21 12:12:08'，不喜欢=10，其中media.id=572
Trx读取视图将不会看到id大于等于0 1115749的Trx，而会看到id小于0 1115740的Trx
---事务0 1115743，活动14秒，进程号15360，操作系统线程id 140486826034944
mysql表正在使用1，已锁定1
MySQL线程id 23，查询id 11601 localhost mediacore\u用户表锁
更新媒体集修改时间：2011-12-21 12:11:55'，视图=（media.views+1），其中media.id=1048
Trx读取视图将不会看到id大于等于0 1115744的Trx，而会看到id小于0 1115740的Trx
---事务0 1115742，活动14秒，进程号15360，操作系统线程id 140486825502464
mysql表正在使用1，已锁定1
MySQL线程id 90，查询id 11599 localhost mediacore\u用户表锁
更新媒体集修改时间：2011-12-21 12:11:55'，视图=（media.views+1），其中media.id=1048
Trx读取视图将不会看到id大于等于0 1115743的Trx，而会看到id小于0 1115740的Trx
---事务0 1115741，活动14秒，进程号15360，操作系统线程id 140486825768704开始读取索引
mysql表正在使用1，已锁定1
锁等待2个锁结构，堆大小368，1个行锁
MySQL线程id 73，查询id 11596 localhost mediacore\u用户更新
更新媒体集修改时间：2011-12-21 12:11:55'，视图=（media.views+1），其中media.id=1048
Trx读取视图将不会看到id大于等于0 1115742的Trx，而会看到id小于0 1115740的Trx
-------TRX已等待14秒，等待授予此锁：
记录锁定空间id 0第1025页n位88索引'PRIMARY'表'mediacore'。'media'trx id 0 1115741锁定模式X锁定rec但不锁定间隙等待
记录锁，堆号20物理记录：n_字段27；紧凑格式；信息位0
0:len4；hex 8000418；asc；；1:len6；十六进制00000011065c；asc\；；2:len7；十六进制0000000 3C20D5B；asc[；；3:len 5；hex 766964656f；asc视频；；4:len 30；hex 617273656C696F2D7061746F2D64652D636176616C686F2D686F6D656E；asc arselio pato de carvalho homen；…（截断）；5:len 4；hex 8000013；asc；；6:len 1；hex 81；asc；；7:len 1；hex 81；asc；；8:len 1；hex；asc；；9:len 8；hex 800012；Asc217B8B！{；；10:len 8；hex 8000124a8230e083；asc J 0；；11:len 8；hex 8000124a82220ef0；asc J；；；12:SQL NULL；13:len 30；hex 417273C3A96C696F205061746F206465204361776616C686F20686F6D65；asc Ars lio Pato de Carvalho home；…（截断）；14:SQL NULL；15:len 30；hex 3C703E43656E74726F206465204E6575726F6369C3AA6E636996173206520；ascncias e神经中枢；…（截断）；16:len 30；hex 43656E74726F206465204E65726F6369C3AA6E639617320652042696F；asc ncias e神经中枢；…（截断）；17:SQL NULL；18:len 4；hex 8000000；asc；；19:len 4；hex 8000099；asc；；20:len 4；hex 8000000；asc；；21:len 4；hex 8000000；asc；；22:len 3；hex 554356；asc UCV；；23:len 9；hex 7563764075632e7074；ascucv@uc.pt；24:len 4；十六进制8000000；asc；；25:len 4；十六进制8000000；asc；；26:len 4；十六进制8000000；asc;;
------------------
---事务0 1115740，活动14秒，进程号15360，操作系统线程id 140486792083200
2个锁结构，堆大小368，1个行锁，撤消日志条目1
MySQL线程id 97，查询id 11597 localhost mediacore\u用户表锁
选择1
来自媒体(全文)
限制1
Trx读取视图将不会看到id大于等于0 1115741的Trx，而会看到id小于0 1115741的Trx
--------
文件I/O
--------
I/O线程0状态：正在等待I/O请求（插入缓冲线程）
I/O线程1状态：等待I/O请求（日志线程）
I/O线程2状态