InnoDB: Warning: a long semaphore wait: 813 --Thread 139957495039744 has waited at btr0cur.cc line 545 for 241.00 seconds the semaphore: 814 X-lock (wait_ex) on RW-latch at 0x7f4a60043da8 created in file dict0dict.cc line 2341 815 a writer (thread id 139957495039744) has reserved it...
InnoDB: Warning: a long semaphore wait 1. 接着出现错误: 1. Error: semaphore wait has lasted > 600 seconds 1. 随后服务自动关闭,网上资料说是因为哈希自适应索引的问题,mysql的哈希自适应索引是默认开启的,这样建立索引后,读取和写入的效率能提高2倍以上,但是有可能会出现死锁的问题,网上建议关闭 innodb_a...
操作系统的等待相对于空转等待(spin wait)。 2)–Thread 140653057947392 has waited at btr0pcur.c line 437 for 0.00 seconds the semaphore: 这部分显示的是当前正在等待互斥量的innodb线程,在这里可以看到有两个线程正在等待,每一个都是以–Thread <数字> has waited…开始,这一段内容在正常情况下应该是空的...
812 InnoDB: Warning: a long semaphore wait: 813 --Thread 139957495039744 has waited at btr0cur.cc line 545 for 241.00 seconds the semaphore: 814 X-lock (wait_ex) on RW-latch at 0x7f4a60043da8 created in file dict0dict.cc line 2341 815 a writer (thread id 139957495039744) has reserved...
MySQL报错InnoDB: A long semaphore wait【转】 mysql登录后无法执行命令如show processlist 查看MySQL错误日志 参考以下方法,执行 1、系统层面 [root@pisphkdcbsql01 ~]#cat/proc/sys/kernel/sem2503200032128[root@pisphkdcbsql01~]#echo"kernel.sem=250 32000 100 128">> /etc/sysctl.conf...
Description:Innodb crashed MySQL because of a long semaphore wait on log_sys->checkpoint_lock The initial warning message. The thread is waiting for an S lock on a mutex for which it holds the X lock. I think this is because IO completion by the background IO log thread will trigger a...
InnoDB: Warning: a long semaphore wait: --Thread 1165379920 has waited at btr0cur.c line 424 for 241.00 seconds the semaphore: S-lock on RW-latch at 0x2aab6b99eee0 created in file buf0buf.c line 497 a writer (thread id 1164314960) has reserved it in mode wait exclusive ...
Re: Warning: a long semaphore wait 3071 Atanu Saha April 05, 2018 10:05AM Re: Warning: a long semaphore wait 3271 Peter Brawley April 05, 2018 12:43PM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective copyrig...
Description:We are getting many of these errors in the error.log: InnoDB: Warning: a long semaphore wait: Eventually the server freezes. After the server has been locked for five mins MySQL restarts itself. See the attached log file for complete details.How to repeat:I found this post:http...
The thread will not transition into kernel mode and it will not wait on a kernel object. On the other hand, when there is contention for the lock, the lock becomes much slower because threads will transition to kernel mode and they will wait on a semaphore kernel object. Also, this lock...