hi friends,
i have installed redhat Cent O.S 4.2 on my sever.

while client is accesing its homepage , it has a slow response.
when client use ftp for file transfer, response from server is slow.
i am running php software and MYSQL database in my server.

i am using 80GB hard disk and still 28GB freespace is remaining.
i have 512 MB of memory, in which currently 91 MB is still free.

o/p for " vmstat" command is

procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 160 91296 40656 287300 0 0 9 7 60 34 0 0 100 0



o/p for "free" command is

total used free shared buffers cached
Mem: 507932 416572 91360 0 40636 287284
-/+ buffers/cache: 88652 419280
Swap: 779144 160 778984






o/p of "top" command is


top - 14:31:52 up 2 days, 1:12, 2 users, load average: 0.00, 0.00, 0.00
Tasks: 74 total, 1 running, 73 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.7% us, 0.0% sy, 0.0% ni, 98.3% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 507932k total, 416772k used, 91160k free, 40612k buffers
Swap: 779144k total, 160k used, 778984k free, 287268k cached



In the /var/log/messages there are no errors
But in the /var/log/httpd/error_log it is showing a long list of same error i.e" an unknown filter was not added :PHp".in this way my server is responding very slow for ftp and while accesssing through http.will u pls help me to solve this problem.