Error or overload Forum

[Jackie1]

Hello everyone, I have a question please ask because people want to help ease fears.

My site not longer long to understand why being overload, though Server hosting is normal, other websites are normal load.

When you check the error log in cpanel I get the Report as follows:

[Fri Nov 20 18:53:27 2009] [error] [client 58.xxxx] [Fri Nov 20 18:53:27 2009] [info] Executing "/ home / xxxxxx / public_html / forum / attachment.php" as UID 519, GID 519, referer: http://www.khoahocphothong.net/forum/showthread.php?t=159926

[Fri Nov 20 18:53:26 2009] [error] [client 58.xxxx] [Fri Nov 20 18:53:26 2009] [info] Executing "/ home / xxxx / public_html / forum / attachment.php" as UID 519, GID 519, referer: http://www.khoahocphothong.net/forum/showthread.php?t=159926

[Fri Nov 20 18:53:30 2009] [error] [client 123.xxxx] [Fri Nov 20 18:53:30 2009] [info] Executing "/ home / xxxxx / public_html / forum / forumdisplay.php" as UID 519, GID 519, referer: http://www.khoahocphothong.net/forum/forumdisplay.php?f=64

[Fri Nov 20 18:53:30 2009] [error] [client 67.xxxx] [Fri Nov 20 18:53:30 2009] [info] Executing "/ home / xxxx / public_html / forum / tags.php" as UID 519, GID 519