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Old 21st February 2008, 11:20
dimitar dimitar is offline
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Unhappy Site very slow after server migraion

Hi All,

I have moved one of my ISPconfig servers to a new hardware. The server hosts a couple of sites but only one of them is currently active and used. The problem is that after i moved the server to the new hardware this site has become very very very slow, it's copied 1:1 from the old to the new server, no changes are made on the new after moving.

So here is the situation:

The server is moved according this tread http://www.howtoforge.com/forums/showthread.php?t=2717

Old server:
hardware - Opteron 146, 512 RAM, 2x80 GB PATA HDD's
software - Debian etch 32bit, RAID1, ISPconfig 2.2.11

New server:
hardware - Intel Core2 Duo E4500, 3GB RAM, 2x300 GB SATA HDD's
software - Debian etch 64bit, RAID1, ISPconfig 2.2.19

After moving the data and changing the settings, everything worked perfectly except that the site is very slow. On the old server i had done some apache/mysql optimizing, so i copied also my apache2.conf and my.conf 1:1 to the new server and restarted them - this did not helped at all. After that i have tried to optimize my old apache/mysql settings to the new hardware by raising up some values in the configs but that also did not helped at all.
In the logs of mysql and apache there is nothing suspicious, and the server did not get loaded when users are browsing the site.
When i try to access the site while i am watching the output of top i get following:

Code:
top - 11:12:14 up 6 days, 23:53,  1 user,  load average: 0.10, 0.04, 0.02
Tasks: 153 total,   1 running, 152 sleeping,   0 stopped,   0 zombie
Cpu(s):  5.5%us,  1.8%sy,  0.0%ni, 92.2%id,  0.0%wa,  0.5%hi,  0.0%si,  0.0%st
Mem:   3059892k total,  3014640k used,    45252k free,    69976k buffers
Swap:  2931768k total,       48k used,  2931720k free,  2577260k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
10749 mysql     15   0  378m  75m 5652 S    7  2.5  38:13.75 mysqld
 8390 www-data  15   0  233m  14m 5640 S    1  0.5   0:00.17 apache2
 8391 www-data  15   0  230m  12m 4332 S    1  0.4   0:00.15 apache2
 8434 www-data  16   0  231m  14m 5504 S    1  0.5   0:00.05 apache2
 8453 www-data  15   0  230m  12m 4328 S    1  0.4   0:00.03 apache2
 7710 root      18   0  2700  456  368 S    0  0.0   0:00.42 cronolog
 8177 www-data  15   0  233m  15m 5692 S    0  0.5   0:00.63 apache2
 8313 www-data  15   0  233m  14m 5612 S    0  0.5   0:00.32 apache2
 8437 www-data  15   0  233m  14m 5544 S    0  0.5   0:00.05 apache2
 8451 www-data  15   0  232m  14m 5400 S    0  0.5   0:00.03 apache2
 8452 www-data  15   0  230m  12m 4340 S    0  0.4   0:00.04 apache2
 8456 www-data  15   0  232m  14m 5092 S    0  0.5   0:00.01 apache2
and in the bottom bar of the browser appears "Waiting for domain XXX", after waiting > 5-6 secs everything comes at ones... On the old server when i browse the i should not wait more than 1 sec...

I am very confused, where should i look for the problem, it is very unpleasant because the site is live on the new server and users complain that its pretty much slower than on the old server.
Please help!

Thanks!

p/s access to ISPconfig admin interface via web is not slow, its working perfect
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