Sluggish servers
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  1. Mark
  2. Wednesday, 22 February 2017
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We run a few CL6 servers with these specs:
4x Intel(R) Xeon(R) CPU X5675 @ 3.07GHz

I found these servers terribly slow, at least the first time I run a command. The second time, it's fast (since I assume it's in cache mem)

Now, take a simple php file with this content "<?php phpinfo();". When I run this command:

strace -f /opt/alt/php56/usr/bin/php info.php
real 0m33.552s
user 0m0.086s
sys 0m0.070s

The second time:
real 0m0.151s
user 0m0.084s
sys 0m0.052s

During the first time, strace shows that it's loading tons of files, it's so slow, I have plenty of time to see what it's loading.
This server runs apache with LVE for a few thousand websites (the machines are in a LB setup).

Everything is slow on these servers (at least the first time).

A random "free" on one of the machines:
total used free shared buffers cached
Mem: 16280500 15677896 602604 2252 199476 8706344
-/+ buffers/cache: 6772076 9508424
Swap: 4194300 53680 4140620

Anyone has an idea what could be the issue here?

Kind regards,
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  1. 16.03.2017 11:03:29
  2. # 1
Mark Accepted Answer
Posts: 0
Joined: 21.09.2020

I have the same issue when I run these commands as root.

I'll create a support ticket.

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