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Re: Physical Log Size

Posted By: Art Kagel
Date: Wednesday, 26 January 2011, at 12:11 p.m.

In Response To: Re: Physical Log Size (KENT GRUNDEN)

Metrics look good. More buffers will probably help a bot more as s BTR over
6 is ok but bit high, so try increasing buffers again.
The RAU is over 100 because you got the formula from an old post where I did
it backwards. Divide the used by the sum of the other RA values.
Art
On Jan 26, 2011 9:40 AM, "KENT GRUNDEN" <k.grunden@hoogwegtus.com> wrote:
> Art,
> I doubled my SHMVIRTSIZE from 120704 to 241408,
> Increased the BUFFERPOOL from 10000 to 50000
> and increased the CLEANERS from 8 to 16
>
> Here are my calculations for the metrics
> BR = 5.009
> BTR = 6.7479
> RAU = 101.22 ??
>
> I think they look OK and users have commented that the database is faster.
>
> I still am a little concerned about my AIO and KIO readings
>
> =================================================================
> D:\Program Files\IBM\IBM Informix Dynamic Server\11.50>onstat -g iob
>
> IBM Informix Dynamic Server Version 11.50.FC4WE -- On-Line -- Up 16:35:53
--
> 483456 Kbytes
>
> AIO big buffer usage summary:
> class reads writes
>
> pages ops pgs/op holes hl-ops hls/op pages ops pgs/op
> drda_dbg 0 0 0.00 0 0 0.00 0 0 0.00
> sqli_dbg 0 0 0.00 0 0 0.00 0 0 0.00
> kio 6782521 2526233 2.68 720170 125095 5.76 22584 13825 1.63
> adt 0 0 0.00 0 0 0.00 0 0 0.00
> msc 0 0 0.00 0 0 0.00 0 0 0.00
> aio 51280 3492 14.68 0 0 0.00 60288 4055 14.87
> pio 0 0 0.00 0 0 0.00 0 0 0.00
> lio 0 0 0.00 0 0 0.00 0 0 0.00
>
> Do I need another aio thread??
> =======================================================
> D:\Program Files\IBM\IBM Informix Dynamic Server\11.50>onstat -g iov
>
> IBM Informix Dynamic Server Version 11.50.FC4WE -- On-Line -- Up 16:40:14
--
> 483456 Kbytes
>
> AIO I/O vps:
> class/vp s io/s totalops dskread dskwrite dskcopy wakeups io/wup errors
> tempops
> kio 0 i 5.3 317058 315644 1414 0 83614965 0.0 0 0
> kio 1 i 10.0 598030 591615 6415 0 341659363 0.0 0 0
> kio 2 i 4.5 267545 263690 3855 0 72618941 0.0 0 0
> kio 3 i 25.4 1522379 1520096 2283 0 557743124 0.0 0 0
> msc 0 i 0.1 4410 0 0 0 4397 1.0 0 4410
> aio 0 i 0.1 7974 3543 4063 0 7975 1.0 0 29
> pio 0 i 0.0 0 0 0 0 1 0.0 0 0
> lio 0 i 0.0 0 0 0 0 1 0.0 0 0
>
> kio 3 seems to be doing much more work than the other kio's
> =====================================================
> D:\Program Files\IBM\IBM Informix Dynamic Server\11.50>onstat -g glo
>
> IBM Informix Dynamic Server Version 11.50.FC4WE -- On-Line -- Up 16:42:03
--
> 483456 Kbytes
>
> MT global info:
> sessions threads vps lngspins
> 141 177 11 0
>
> sched calls thread switches yield 0 yield n yield forever
> total: 0 0 9873401 1192617 1084139934
> per sec: 0 0 0 0 0
>
> Virtual processor summary:
> class vps usercpu syscpu total
> cpu 4 2589.60 829.07 3418.67
> aio 1 0.02 1.17 1.18
> lio 1 0.00 0.00 0.00
> pio 1 0.00 0.00 0.00
> adm 1 0.00 0.00 0.00
> soc 2 0.00 0.00 0.00
> msc 1 0.48 1.18 1.67
> total 11 2590.10 831.42 3421.52
>
> Individual virtual processors:
> vp pid class usercpu syscpu total Thread Eff
> 1 2036 cpu 605.25 38.03 643.28 60126.65 1%
> 2 2352 adm 0.00 0.00 0.00 0.00 0%
> 3 2652 cpu 732.18 345.72 1077.90 60125.33 1%
> 4 2664 cpu 1090.40 396.98 1487.38 60125.29 2%
> 5 2672 cpu 161.77 48.33 210.10 60125.24 0%
> 6 2696 lio 0.00 0.00 0.00 0.01 0%
> 7 2732 pio 0.00 0.00 0.00 0.02 0%
> 8 2764 aio 0.02 1.17 1.18 60014.94 0%
> 9 2768 msc 0.48 1.18 1.67 60102.37 0%
> 10 2800 soc 0.00 0.00 0.00 NA NA
> 11 2804 soc 0.00 0.00 0.00 NA NA
>
> tot 2590.10 831.42 3421.52
>
> ====================================================
> D:\Program Files\IBM\IBM Informix Dynamic Server\11.50>onstat -g iob
>
> IBM Informix Dynamic Server Version 11.50.FC4WE -- On-Line -- Up 16:42:13
--
> 483456 Kbytes
>
> AIO big buffer usage summary:
> class reads writes
>
> pages ops pgs/op holes hl-ops hls/op pages ops pgs/op
> drda_dbg 0 0 0.00 0 0 0.00 0 0 0.00
> sqli_dbg 0 0 0.00 0 0 0.00 0 0 0.00
> kio 7359019 2787326 2.64 777719 134603 5.78 22922 13967 1.64
> adt 0 0 0.00 0 0 0.00 0 0 0.00
> msc 0 0 0.00 0 0 0.00 0 0 0.00
> aio 51872 3529 14.70 0 0 0.00 60416 4063 14.87
> pio 0 0 0.00 0 0 0.00 0 0 0.00
> lio 0 0 0.00 0 0 0.00 0 0 0.00
>
> Does this mean there are no ready threads??
> =======================================================
> D:\Program Files\IBM\IBM Informix Dynamic Server\11.50>onstat -g rea
>
> IBM Informix Dynamic Server Version 11.50.FC4WE -- On-Line -- Up 16:42:22
--
> 483456 Kbytes
>
> Ready threads:
> tid tcb rstcb prty status vp-class name
>
> Thanks
> Kent
>
>
>
*******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
--20cf3054a547e1f8f0049ac2dcfb

Messages In This Thread

Physical Log Size
KENT GRUNDEN -- Tuesday, 25 January 2011, at 2:09 p.m.
- Re: Physical Log Size
  Art Kagel -- Tuesday, 25 January 2011, at 2:20 p.m.
  - Re: Physical Log Size
    KENT GRUNDEN -- Tuesday, 25 January 2011, at 2:51 p.m.
    - Re: Physical Log Size
      Art Kagel -- Tuesday, 25 January 2011, at 4:03 p.m.
      - Re: Physical Log Size
        KENT GRUNDEN -- Wednesday, 26 January 2011, at 11:40 a.m.
        
        Re: Physical Log Size
        Art Kagel -- Wednesday, 26 January 2011, at 12:11 p.m.
        
        Re: Physical Log Size
        TRI TRINH -- Tuesday, 22 February 2011, at 2:58 p.m.
        
        Re: Physical Log Size
        Art Kagel -- Tuesday, 22 February 2011, at 6:14 p.m.
- Re: Physical Log Size
  Mirav Kapadia -- Tuesday, 25 January 2011, at 2:21 p.m.

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