Nginx错误mmap failed (28: No space left on device)解决办法

[root@host38 www.ctohome.com]# mynginx test
the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
[alert]: mmap(MAP_ANON|MAP_SHARED, 52428800) failed (28: No space left on device)
configuration file /usr/local/nginx/conf/nginx.conf test failed

如果是做了proxy cache的nginx，别管机器配置，直接调这个设置。
 proxy_cache_path /backup/nginx_cache/proxy_cache_dir levels=1:2 keys_zone=ctohome:50m inactive=1d max_size=3g;把cache_one值改成20m就可以了。

[root@host38 www.ctohome.com]# mynginx test
the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
configuration file /usr/local/nginx/conf/nginx.conf test is successful

说明这个No space left on device可能是指的内存。有些openvz的vps，内存看起来大，但实际用不了。