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IDS Forum

Re: Slow Bulk Loading problem

Posted By: Art Kagel
Date: Wednesday, 14 October 2015, at 11:14 a.m.

In Response To: Re: Slow Bulk Loading problem (CHALLENGER212 ABDERRAFI)

OK, so there's a major problem. Service times for your disks should,
ideally, be less than 10ms (0.010s) for reads and less than 15ms (i0.015s)
for writes. Your are getting 80 to 92 SECONDS per IO for your read service
times and 7 to 10 SECOND service times for writes! Your IOs should be 1000
to 10,000 time faster! I'm not kidding!

This may be the result of the Windows compression, or a problem with the
underlying disk(s). Are the drives older than 4 years? If so, they may be
experiencing massive IO errors that are being corrected internally without
reporting to the OS and may soon fail. I just don't know at this point.

Art

Art S. Kagel, President and Principal Consultant
ASK Database Management
www.askdbmgt.com

Blog: http://informix-myview.blogspot.com/

Disclaimer: Please keep in mind that my own opinions are my own opinions
and do not reflect on the IIUG, nor any other organization with which I am
associated either explicitly, implicitly, or by inference. Neither do
those opinions reflect those of other individuals affiliated with any
entity with which I am affiliated nor those of the entities themselves.

On Wed, Oct 14, 2015 at 10:56 AM, CHALLENGER212 ABDERRAFI <
abderrafi212@gmail.com> wrote:

> Hi, this is the result of onstat -g iof
>
> IBM Informix Dynamic Server Version 12.10.FC4 -- On-Line -- Up 1 days
> 02:34:42
> -- 4860096 Kbytes
>
> AIO global files:
> gfd pathname bytes read page reads bytes write page writes io/s
> 3 **M:\IFMXDATA\ARCHIVAGE_CCP\ROOTLOGDBS\rootdbs_dat.000 26832896 6551
> 42045440 10265 0.0
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 5026 121.5852
>
> kaio_writes 9333 12.5019
>
> 4 **M:\IFMXDATA\ARCHIVAGE_CCP\ROOTLOGDBS\datatemp_ARCHIVAGE_CCP.000 12288 3
> 16384 4 0.0
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 3 119.0422
>
> kaio_writes 2 0.1060
>
> 5 **M:\IFMXDATA\ARCHIVAGE_CCP\ROOTLOGDBS\datatemp_ARCHIVAGE_CCP.001 4096 1
> 8192 2 11.2
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 1 0.0379
>
> kaio_writes 2 0.1144
>
> 6 **M:\IFMXDATA\ARCHIVAGE_CCP\ROOTLOGDBS\datalog_ARCHIVAGE_CCP.000 167936
> 41
> 31842304 7774 0.1
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 10 81.8401
>
> kaio_writes 5194 7.0370
>
> 7 **M:\IFMXDATA\ARCHIVAGE_CCP\ROOTLOGDBS\datalog_ARCHIVAGE_CCP.001 4096 1
> 0 0
> 7.5
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 1 0.1338
>
> kaio_writes 0 N/A
>
> 40 **M:\IFMXDATA\ARCHIVAGE_CCP\DATAS\DATACHUNK_OF.000 699043840 170665
> 36884480 9005 0.0
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 72904 77.5283
>
> kaio_writes 7297 12.8232
>
> 41 **M:\IFMXDATA\ARCHIVAGE_CCP\DATAS\DATACHUNK_OF.001 717266944 175114 0 0
> 0.0
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 65172 80.3576
>
> kaio_writes 0 N/A
>
> 42 **M:\IFMXDATA\ARCHIVAGE_CCP\DATAS\DATACHUNK_OF.002 478650368 116858 0 0
> 0.0
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 43177 81.2606
>
> kaio_writes 0 N/A
>
> 43 **M:\IFMXDATA\ARCHIVAGE_CCP\DATAS\DATACHUNK_OF.003 973074432 237567 0 0
> 0.0
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 84575 78.0467
>
> kaio_writes 0 N/A
>
> 44 **M:\IFMXDATA\ARCHIVAGE_CCP\DATAS\DATACHUNK_OF.004 262873088 64178 0 0
> 0.0
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 25463 79.2424
>
> kaio_writes 0 N/A
>
> 45 **M:\IFMXDATA\ARCHIVAGE_CCP\DATAS\DATACHUNK_OF.005 105947136 25866 0 0
> 0.0
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 8893 81.0555
>
> kaio_writes 0 N/A
>
> 46 **M:\IFMXDATA\ARCHIVAGE_CCP\DATAS\DATACHUNK_OF.006 590946304 144274 0 0
> 0.0
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 48969 83.5233
>
> kaio_writes 0 N/A
>
> 47 **M:\IFMXDATA\ARCHIVAGE_CCP\DATAS\DATACHUNK_OF.007 744337408 181723 0 0
> 0.0
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 64085 81.8259
>
> kaio_writes 0 N/A
>
> 48 **M:\IFMXDATA\ARCHIVAGE_CCP\DATAS\DATACHUNK_OF.008 458547200 111950 0 0
> 0.0
>
> op type count avg. time
>
> seeks 0 N/A
>
> reads 0 N/A
>
> writes 0 N/A
>
> kaio_reads 42601 83.9845
>
> kaio_writes 0 N/A
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

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