Connect(1) to MySQL failed

The URL Is:
http://192.168.2.8/bbs/thread.php?fid=176

MySQL Server Error:
Can't create a new thread (errno 12); if you are not out of available memory, you can consult the manual for a possible OS-dependent bug ( 1135 )

You Can Get Help In:
http://www.phpwind.net 。打开内网出现的。偶尔回帖或者点击一下就会出现。怎么回事哦？

出现N次了唉Connect(1) to MySQL failed

The URL Is:
http://192.168.2.8/bbs/post.php?

MySQL Server Error:
Can't create a new thread (errno 12); if you are not out of available memory, you can consult the manual for a possible OS-dependent bug ( 1135 )

You Can Get Help In:
http://www.phpwind.net