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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