新服务器 出现500错误 重启PHP后恢复！
Apr 25 22:27:01.061936 fpm_stdio_child_said(), line 167: child 22759 (pool default) said into stderr: "mmap cache can't open /home/include/common.file.func.php - Too many open files in system (pid 22759)"Apr 25 22:27:01.378559 fpm_stdio_child_said(), line 167: child 22753 (pool default) said into stderr: "mmap cache can't open /home/data/config.cache.inc.php - Too many open files in system (pid 22753)"
Apr 25 22:27:29.045073 fpm_stdio_child_said(), line 167: child 22743 (pool default) said into stderr: "mmap cache can't open /home/include/common.file.func.php - Too many open files in system (pid 22743)"
之前一直没有遇到过类似问题， 查看PHP 日志有以上提示，求指导 什么原因造成的，如何解决
Too many open files in system 可以在 /usr/local/php/etc/php-fpm.conf 中添加 rlimit_files = 65535
然后重启php-fpm试试
500错误和前面的php-fpm日志里的警告信息应该是没关系的，500错误要开php错误日志，可以查看官网常见问题查找开启php错误日志的方法
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