Slow Frontend Zabbix Performance

[Kalin35]

We currently just setup a zabbix server with the configuration below. Majority of the time, the web front end takes a while to load pages. Sometimes graphs take a long time to load or it is just a basic page (such as discovered members) that takes a while to load. Any ideas what could be going on?

Current Configuration:
2x2.8GHz
6GB Memory
Zabbiz 1.8.6
PostgreSQL 9.0


PostgresSQL Tunning:
shared_buffers = 2048MB
effective_cache_size = 3584MB
checkpoint_segments = 32
work_mem = 128MB
maintenance_work_mem = 32MB

Zabbix Stats:
Number of hosts (monitored/not monitored/templates) - 66 / 1 / 42
Number of items (monitored/disabled/not supported) 5794 / 1109 / 32
Number of triggers (enabled/disabled)[problem/unknown/ok] 2095 / 20 [4 / 3 / 2088]
Required server performance, new values per second 233.22 -


The memory, CPU, etc looks to be fine at all times. I don't see any spikes or anything. Anyone have any other tunning ideas to increase performance?

Thanks!

[guesommer]

Frontend runs PHP, so it might be something in your PHP/apache settings... Thans now just a guess, but your settings look quite fine.

Also the database might be of intrested. Have you set the memory settings in postgres?

Br, G.

We currently just setup a zabbix server with the configuration below. Majority of the time, the web front end takes a while to load pages. Sometimes graphs take a long time to load or it is just a basic page (such as discovered members) that takes a while to load. Any ideas what could be going on?

Current Configuration:
2x2.8GHz
6GB Memory
Zabbiz 1.8.6
PostgreSQL 9.0


PostgresSQL Tunning:
shared_buffers = 2048MB
effective_cache_size = 3584MB
checkpoint_segments = 32
work_mem = 128MB
maintenance_work_mem = 32MB

Zabbix Stats:
Number of hosts (monitored/not monitored/templates) - 66 / 1 / 42
Number of items (monitored/disabled/not supported) 5794 / 1109 / 32
Number of triggers (enabled/disabled)[problem/unknown/ok] 2095 / 20 [4 / 3 / 2088]
Required server performance, new values per second 233.22 -


The memory, CPU, etc looks to be fine at all times. I don't see any spikes or anything. Anyone have any other tunning ideas to increase performance?

Thanks!

[0siris]

I'm not into pgsql, but can you post what the pgsql threads are doing while waiting for a response from the gui?
Also, can you post the output of this command:

vmstat 1 10

[Colttt]

what of kind of harddisk do you use?? and wich filesystem??

the best at the moment is SSD+ext4

[guesommer]

Also ensure to use a battery backed write cache on your raid controller, this can improve the write by ten times

[Kalin35]

Anyone have any ideas of any PHP or Apache settings to look at? All the PHP settings are pretty much what are recommended by Zabbix during the installation.

Also, I truned on pgsql slow query logs that logs any SQL that takes longer than 200ms and I only saw 1 slow query during the whole entire day.

Does anyone else have any other ideas? The system resources are barly being touched as well.

Are there any zabbix_server.conf settings that could cause this? I pretty much have the defaults. I don't see anything being queued either.


Here is the output of vmstat 1 10 - this was ran while the dashboard was loading which took a little while:

20:50:50 # vmstat 1 10
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
0 0 0 1229812 435004 1915752 0 0 2 14 51 19 0 0 99 0 0
0 0 0 1229812 435004 1915752 0 0 0 0 1070 200 0 0 99 0 0
1 0 0 1228076 435004 1915768 0 0 0 12 1086 248 4 0 95 0 0
0 0 0 1229696 435004 1915768 0 0 0 24 1057 305 6 1 92 0 0
0 0 0 1229580 435004 1915776 0 0 0 352 1190 480 5 1 94 0 0
0 0 0 1229580 435008 1915772 0 0 0 188 1064 229 0 0 100 0 0
0 0 0 1229588 435008 1915840 0 0 0 0 1090 191 0 0 100 0 0
0 0 0 1229588 435008 1915840 0 0 0 80 1061 171 0 0 100 0 0
0 0 0 1229596 435008 1915840 0 0 0 0 1087 212 0 0 100 0 0
0 0 0 1229596 435008 1915840 0 0 0 176 1070 340 2 1 98 0 0

[Colttt]

you can tune you apache2.. remove all you not used modules. and use mod_deflate

and take a lokk at top when you go to zabbix and look which process is high in top..

or take a look at google