Host 55: poor performance
While I may not have super-optimized every detail, this is still scaringly slow. It is typical Apache2+PHP4.4+eaccelerator+Mysql4 setup on a small debian stable.
cat /proc/io_status during page load:
io_count=3344568 io_rate=115 io_tokens=399998 token_refill=512 token_max=400000
vmstat 1 during page load:
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
1 4 132576 1632 2468 5512 0 0 0 0 109 21 0 0 100 0
0 4 132572 1616 2468 5516 12 0 13 14 150 24 0 0 100 0
0 4 132572 1616 2468 5516 0 0 0 0 111 20 0 0 100 0
0 4 132568 1564 2480 5548 0 0 30 1 118 27 1 3 96 0
0 6 132568 1528 2480 5564 0 0 20 0 128 22 0 0 100 0
Any ideas?
PS. Have observed this over several weeks with host-load from low to maximum.
4 Replies
Are you sure those vmstat numbers are from when a page was actually loading? Because it looks like your system was nearly idle.
It almost makes me wonder if it is some sort of network issue because your system looks pretty calm. Only your memory looks used, but that should only drastically affect performance when it swaps heavily which it isn't appearing to do.
What I have noticed, though, is that hostload tends to be maximum for extended periods, during which it is almost impossible for me to get in contact with my system.
As I understand it, host load is the cummulative load from all the virtual servers hosted. Could I have run into several Gentoo-users? (I have myself used gentoo
I can understand I don't get superperformance, but should still be able to do minimum stuff like editing files without waiting for 5-10 seconds.
/me still wonders whether he has fscked up somewhere or is just unfortunate.
I have nothing serious running. Delay happens most often at the password prompt, for some reason, but even the shortest commands can take 5-10 seconds.
(Yes, my sshd_config has "ReverseMappingCheck no")