PHP下免费的加速器，PHPAccelerator
http://php-accelerator.co.uk/ 可以下载,是zend的强劲对手,是免费的,我已经在用啦,效果还不错,修改 php.ini 加上：
- zend_extension = /usr/local/lib/php_accelerator_1.3.3r2.so
- phpa = on
- phpa.tweaks = on
- phpa.cache_dir = /tmp
- phpa.file_perms = 400
- phpa.cache_file_prune_period = 1h
- phpa.cache_file_ttl = 1d
- phpa.shm_size = 10
- phpa.shm_key = 0xc0deb00
- phpa.shm_perms = 666
- phpa.shm_user = nobody
- phpa.shm_group = nobody
- phpa.shm_release_at_exit = on
- phpa.shm_stats_check_period = 5m
- phpa.shm_ttl = 12h
- phpa.shm_max_processes = 512
- phpa.shm_lock_threshold0 = 10
apachectl graceful 就能用啦。具体参数看它的文档。