Nagios and Gearman - huge environment performance problem
Rodney Ramos
rodneyra at gmail.com
Fri Aug 19 18:27:20 CEST 2011
Hi, Daniel,
As we can see below, I think it is not a hardware problem. The idle CPU is
beteween 60 and 80 %, very good.
Thank you very much.
$ vmstat 5
procs -----------memory---------- ---swap-- -----io---- --system--
-----cpu------
r b swpd free buff cache si so bi bo in cs us sy id
wa st
1 2 22092 3046788 189640 890940 0 0 295 1053 0 0 4 3 83
10 0
1 2 22092 3032992 189664 904600 0 0 2733 7550 3498 7477 12 1 69
18 0
1 2 22092 3018240 189668 918632 0 0 2720 4070 2484 5114 13 1 72
15 0
1 0 22092 3008312 189668 930336 0 0 2332 1534 1932 3825 13 1 73
14 0
1 18 22092 2979292 189724 945780 0 0 1486 13974 2460 8446 16 2 72
10 0
1 2 22092 2965244 189736 959228 0 0 2570 9094 3290 7204 13 1 67
19 0
1 2 22092 2949064 189748 973100 0 0 2820 3040 2798 6639 13 2 68
17 0
1 6 22092 2936060 189768 987788 0 0 2894 3620 2474 5443 13 1 70
16 0
1 1 22092 2923320 189780 999708 0 0 2377 2618 2285 4794 13 1 70
16 0
1 0 22092 2923428 189780 999964 0 0 0 4575 1732 2317 12 1 86
1 0
1 9 22092 2912192 189784 1005260 0 0 402 4544 1541 3889 14 1
82 3 0
1 7 22092 2891692 189808 1023020 0 0 2534 13969 3232 9421 14 2 66
17 0
3 2 22092 2868908 189836 1037064 0 0 2797 4115 3002 7055 30 2 54
14 0
2 2 22092 2860712 189860 1050376 0 0 2646 3352 2448 5416 16 1 67
17 0
1 8 22092 2847052 189872 1064036 0 0 2748 3970 2616 5487 13 1 69
17 0
1 0 22092 3469576 189876 462624 0 0 825 1245 1379 2098 12 1 83
5 0
1 0 22092 3469248 189884 462720 0 0 4 2631 1552 2599 13 0 86
0 0
1 20 22092 3449816 189904 482192 0 0 2404 8454 2293 7764 15 2 70
12 0
1 17 22092 3434856 189912 495636 0 0 2694 8955 3542 8039 13 2 65
19 0
2 7 22092 3422204 189932 509376 0 0 2742 4059 2685 5826 13 1 68
19 0
1 13 22092 3407532 189948 522508 0 0 2661 3613 6447 49867 12 4 66
17 0
0 0 22092 3404484 189968 525964 0 0 669 3338 5317 43602 10 4
81 6 0
1 0 22092 3402004 189984 525956 0 0 0 14 3637 12700 13 1
85 0 0
1 0 22092 3398172 190012 526036 0 0 0 3318 3972 12401 14 1
85 0 0
2 0 22092 3392628 190028 526048 0 0 0 9331 5347 16423 15 3
81 1 0
4 0 22092 3391704 190048 526060 0 0 0 4270 5785 18736 16 2
80 1 0
1 1 22092 3391652 190064 526056 0 0 0 4091 4746 14669 16 2
82 1 0
1 0 22092 3392104 190068 526056 0 0 0 1562 4037 11849 16 1
83 0 0
3 0 22092 3392304 190084 526168 0 0 1 2532 4618 16418 15 2
83 0 0
1 7 22092 3386028 190112 531488 0 0 967 363 4194 14941 15 2
77 6 0
On Fri, Aug 19, 2011 at 11:32 AM, Daniel Wittenberg <
daniel.wittenberg.r0ko at statefarm.com> wrote:
>
> One simple thing that might help is just run vmstat for a couple minutes:
>
>
>
> vmstat 5
>
>
>
> That can help show if you are hitting some bottlenecks. Are you using a
lot of macros in your configs?
>
>
>
> Dan
>
>
>
> From: Rodney Ramos [mailto:rodneyra at gmail.com]
> Sent: Friday, August 19, 2011 9:30 AM
> To: Nagios Developers List
> Subject: [Nagios-devel] Nagios and Gearman - huge environment performance
problem
>
>
>
> Hi everybody,
>
> I´m testing Nagios and Gearman / Mod_Gearman. I´d like to change NSCA with
this new approach, as it seems easier to configure and has a lot of
advantages. Besides, NSCA and Nagios freshness mechanism have some problems.
>
> Gearman and mod_gearman are working well. I have 30000 hosts and 60000
services, and it is increasing!
>
> Now I´m having problem with Nagios performance, that eats 100% of CPU and
the host and service latency is very big, around 300 seconds. I think that
this a Nagios problem, as the gearman_top shows the Job Wainting queue empty
almost all the time. It seems that Nagios do not send the active checks all
the time, an once in while it sends a burst of active checks.
>
> I have a physical central server, running RHEL, with 4 GB of ram, Intel(R)
Xeon(R) CPU E5504 @ 2.00GHz (8 CPUs). For the workers I have 9 virtual
servers running RHEL too.
>
> I've already set the Nagios parameters to large environment, as
recommended in the documentation, but it made no difference. Thanks.
>
> Nagios Parameters to large environment:
>
> - use_large_installation_tweaks=1
>
> - enable_environment_macros=0
>
> - max_concurrent_checks=0
>
> - check_result_reaper_frequency=10
>
> Could someone help me? How can I improve Nagios performance to make active
checks faster?
>
> Thank you very much.
>
>
>
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