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 <<a href="mailto:daniel.wittenberg.r0ko@statefarm.com">daniel.wittenberg.r0ko@statefarm.com</a>> 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:<a href="mailto:rodneyra@gmail.com">rodneyra@gmail.com</a>] > 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. > > > ------------------------------------------------------------------------------ > Get a FREE DOWNLOAD! and learn more about uberSVN rich system, > user administration capabilities and model configuration. Take > the hassle out of deploying and managing Subversion and the > tools developers use with it. <a href="http://p.sf.net/sfu/wandisco-d2d-2">http://p.sf.net/sfu/wandisco-d2d-2</a> > _______________________________________________ > Nagios-devel mailing list > <a href="mailto:Nagios-devel@lists.sourceforge.net">Nagios-devel@lists.sourceforge.net</a> > <a href="https://lists.sourceforge.net/lists/listinfo/nagios-devel">https://lists.sourceforge.net/lists/listinfo/nagios-devel</a> >