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RE: Checkpoints slowing down the insert on....

Posted By: Alexandre Marini
Date: Tuesday, 18 March 2014, at 2:45 p.m.

In Response To: Re: RE: Checkpoints slowing down the insert on Pri (NITIN MATHUR)

Ok the first thing I´d suggest: activate RTO, instead of using the old feature of frequent checkpoints.
Do it and also increase the default value of memory cache for cpu vps.
That should let the engine run itself, and runs a checkpoint everytime it need, in order to complete the specified RTO policy. I should go for 1800, the maximum allowed value.
Frequent checkpoints are good for non data loss ensurance, but the engine is keeping running with a step on the brakes, every X minutes... let it run by itself. It´s an usual way to start to boost your performance, in a general way. You might see your cpu vps memory caches through onstat -g vpcache report.
After that, you might see some recommendations through onstat -g ckp report, you should follow them in order to grow your RTO policy needs.
Regards.
Alexandre Marini
IBM Informix Certified Professional v10 / v11.50 / v11.70 / v12.10
IBM Information Management Informix Technical Professional
IBM Infosphere DataStage Technical Professional
Informix Senior DBA - Orizon Brasil
BRIUG website administrator
Informix independent consultant
> To: ids@iiug.org
> From: nitin_maths@rediffmail.com
> Subject: Re: RE: Checkpoints slowing down the insert on.... [32738]
> Date: Tue, 18 Mar 2014 14:25:05 -0400
>
> Sorry, I thought about it and forgot to add.
>
> IBM Informix Dynamic Server Version 11.70.FC5X7 -- On-Line (Prim) -- Up 10
> days 00:09:33 -- 36404224 Kbytes
>
> AUTO_CKPTS=On RTO_SERVER_RESTART=Off
>
> Critical Sections Physical Log Logical Log
>
> Clock Total Flush Block # Ckpt Wait Long # Dirty Dskflu Total Avg Total Avg
> Interval Time Trigger LSN Time Time Time Waits Time Time Time Buffers /Sec
> Pages /Sec Pages /Sec
> 185855 08:18:16 CKPTINTVL 98816:0x5ca0018 1.9 1.9 0.0 0 0.0 0.0 0.0 51112
> 26793 18470 61 92921 307
> 185856 08:23:20 CKPTINTVL 98817:0x2658018 4.5 4.4 0.0 0 0.0 0.0 0.0 49147
> 11064 18821 62 87204 289
> 185857 08:28:22 CKPTINTVL 98818:0x1e9c018 2.0 2.0 0.0 0 0.0 0.0 0.0 51443
> 25725 17939 59 98884 325
> 185858 08:33:26 CKPTINTVL 98819:0xe5874e8 4.7 4.7 0.0 1 0.0 0.0 0.0 48898
> 10379 42451 140 152687 505
> 185859 08:38:32 CKPTINTVL 98820:0x12271018 4.3 4.2 0.0 1 0.0 0.0 0.0 62287
> 14774 23154 75 116821 381
> 185860 08:43:35 CKPTINTVL 98821:0x17bc0018 3.5 3.4 0.0 0 0.0 0.0 0.0 62591
> 18215 30176 99 124453 409
> 185861 08:48:39 CKPTINTVL 98823:0x46f5018 3.0 3.0 0.0 1 0.0 0.0 0.0 65737
> 21981 24324 80 122102 401
> 185862 08:53:42 CKPTINTVL 98824:0xeb22470 3.1 3.1 0.0 1 0.0 0.0 0.0 65485
> 21238 25418 83 143792 474
> 185863 08:58:47 CKPTINTVL 98825:0x163ae018 3.1 3.1 0.0 1 0.0 0.0 0.0 65762
> 21475 22345 73 131980 432
> 185864 09:03:52 CKPTINTVL 98827:0x86db018 5.5 5.5 0.0 1 0.0 0.0 0.0 51727 9396
> 27646 91 145299 479
> 185865 09:08:59 CKPTINTVL 98828:0x10986018 5.1 5.1 0.0 1 0.0 0.0 0.0 69155
> 13663 26038 84 135209 440
> 185866 09:14:02 CKPTINTVL 98829:0x183c7018 3.3 3.3 0.0 1 0.0 0.0 0.0 70003
> 21282 28833 94 132456 434
> 185867 09:19:05 CKPTINTVL 98831:0x692d018 3.8 3.8 0.0 1 0.0 0.0 0.0 66942
> 17755 27606 91 128707 424
> 185868 09:24:07 CKPTINTVL 98832:0xe6ba018 2.9 2.9 0.0 0 0.0 0.0 0.0 69358
> 23798 28789 95 133520 440
> 185869 09:29:12 CKPTINTVL 98834:0x159018 5.3 5.3 0.0 2 0.0 0.0 0.0 70586 13300
> 27445 90 143522 475
> 185870 09:34:15 CKPTINTVL 98836:0x11109018 3.9 3.9 0.0 3 0.0 0.0 0.0 65929
> 16945 64942 212 271300 889
> 185871 09:39:20 CKPTINTVL 98838:0x17823018 3.2 3.1 0.0 3 0.0 0.1 0.1 61311
> 19690 38871 127 228144 748
> 185872 09:44:25 CKPTINTVL 98841:0x1193018 3.3 3.2 0.0 1 0.0 0.0 0.0 54812
> 16913 38254 125 209929 688
> 185873 09:49:32 CKPTINTVL 98843:0x2bd6018 5.0 5.0 0.0 1 0.0 0.0 0.0 51866
> 10418 35486 116 208526 683
> 185874 09:54:38 CKPTINTVL 98845:0x4058018 3.6 3.5 0.0 1 0.0 0.0 0.0 51728
> 14739 36368 118 207003 672
>
> Max Plog Max Llog Max Dskflush Avg Dskflush Avg Dirty Blocked
> pages/sec pages/sec Time pages/sec pages/sec Time
> 13235 9809 71 3491 0 0
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>

Messages In This Thread

Checkpoints slowing down the insert on Primary
NITIN MATHUR -- Tuesday, 18 March 2014, at 12:01 p.m.
- RE: Checkpoints slowing down the insert on Primary
  Alexandre Marini -- Tuesday, 18 March 2014, at 1:50 p.m.
  - Re: RE: Checkpoints slowing down the insert on Pri
    NITIN MATHUR -- Tuesday, 18 March 2014, at 2:25 p.m.
    - RE: Checkpoints slowing down the insert on....
      Alexandre Marini -- Tuesday, 18 March 2014, at 2:45 p.m.
      - Re: RE: Checkpoints slowing down the insert on....
        NITIN MATHUR -- Wednesday, 2 April 2014, at 10:24 a.m.
        
        RE: Checkpoints slowing down the insert on....
        Alexandre Marini -- Wednesday, 2 April 2014, at 2:09 p.m.
        
        Re: RE: Checkpoints slowing down the insert on....
        NITIN MATHUR -- Wednesday, 2 April 2014, at 3:21 p.m.
        
        Re: RE: Checkpoints slowing down the insert on....
        david@smooth1.co.uk -- Wednesday, 2 April 2014, at 4:32 p.m.
        
        Re: RE: Checkpoints slowing down the insert on....
        NITIN MATHUR -- Thursday, 3 April 2014, at 9:57 a.m.

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