我收到错误 mysqld dead but pid file exists
这种情况每隔几个小时就会发生一次。如果我重新启动它工作正常，然后再次下降。
[root@ip-10-0-0-149 log]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/xvda1 7.8G 1.5G 6.3G 19% /
devtmpfs 486M 56K 486M 1% /dev
tmpfs 499M 0 499M 0% /dev/shm
tail 给出：
140717 18:28:43 [ERROR] Got an error from thread_id=4432, /builddir/build/BUILD/ mysql-5.5.38/storage/myisam/mi_delete.c:121
140717 18:28:43 [ERROR] MySQL thread id 4432, OS thread handle 0x7ff640688700, q uery id 269080 localhost root updating DELETE FROM wp_statistics_useronline WHERE timestamp < '1405621693'
140717 18:28:43 [ERROR] Got error 134 …mysql ×1