报No space left on device后apache httpd进程没了,怎么办啊

报No space left on device后apache httpd进程没了,怎么办啊

No space left on device: apr_proc_mutex_lock failed. Attempting to shutdown process gracefully

[warn] child process 6385 still did not exit, sending a SIGTERM

报了这两个错误扣,APACHE的HTTPD进程没有了,我的磁盘空间也够用啊,55,请问怎么解决呢
swap 满了