Starting php_fpm eAccelerator: Could not allocate 67108864 bytes, the maximum size the kernel allow

启动PHP错误信息如下：

Starting php_fpm eAccelerator: Could not allocate 67108864 bytes, the maximum size the kernel allows is 33554432 bytes. Lower the amount of memory request or increase the limit in /proc/sys/kernel/shmmax. PHP Warning:  [eAccelerator] Can not create shared memory area in Unknown on line 0 PHP Fatal error:  Unable to start eAccelerator module in Unknown on line 0 failed

解决办法如下：

vi /etc/sysctl.conf kernel.shmmax = 128000000 syscatl -p

#说明
php.ini中设置的eAccelerator，eaccelerator.shm_size="64"，解释：eaccelerator可使用的共享内存大小(单位为MB)，即64M
在Linux下，单个进程的最大内存使用量受/proc/sys/kernel/shmmax中设置的数字限制(单位为字节)  /proc/sys/kernel/shmmax = 33554432 （32M）