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Improve PHP performance

Is your PHP running slow? Are you going to run some performance test? If it mainly tests PHP performance, you should install a stable PHP opcode cache. To make PHP opcode cache more efficient, you should use “ProcessGroup” mode. If cloudlinux cagefs is not used, use “Daemon Mode”.

http://www.litespeedtech.com/docs/litespeed-sapi/php-lsapi/guide-to-suexec-setups

If the server has enough free memory, put PHP sessions, opcode cache disk storage under /dev/shm. If server I/O wait is high, enable AIO logging.