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IDS Forum

Re: 136: ISAM error: no more extents even with....

Posted By: Art Kagel
Date: Thursday, 11 March 2010, at 4:16 p.m.

In Response To: Re: 136: ISAM error: no more extents even with.... (Richard Snoke)

It will get you more rows as long as the rowsize is wider than 4 bytes which
is the ONLY row size that can fit 255 rows on a 2K page! Now if you have an
8byte row you will waste half of each page when using 8K pages, but a 4K
pagesize WILL double the number of rows per page versus a 2K pagesize and
therefore halve the number of pages required.

Art

Art S. Kagel
Advanced DataTools (www.advancedatatools.com)
IIUG Board of Directors (art@iiug.org)

See you at the 2010 IIUG Informix Conference
April 25-28, 2010
Overland Park (Kansas City), KS
www.iiug.org/conf

Disclaimer: Please keep in mind that my own opinions are my own opinions and
do not reflect on my employer, Advanced DataTools, 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 Thu, Mar 11, 2010 at 3:57 PM, Richard Snoke <dsnoke@us.ibm.com> wrote:

> Be careful. The limit of 255 rows per page has not changed. Larger page
> sizes do not raise the limit of rows per fragement. Larger page sizes get
> you larger rows on a page without any remainder pages, but not more rows.
>
> Cheers,
> Dick Snoke
> Executive IT Specialist
> IBM Software Group - ChannelWorks
>
> Tel: (404) 487-1595
> Email: dsnoke@us.ibm.com
>
> From:
> "Informix DBA" <in4mixdba@gmail.com>
> To:
> ids@iiug.org
> Date:
> 03/11/10 02:02 PM
> Subject:
> Re: 136: ISAM error: no more extents even with.... [19316]
> Sent by:
> ids-bounces@iiug.org
>
> You can also move the table to a DBSPACE with a larger page size like 4k
> or
> 8k that way you will fit more rows on a page and thus use fewer pages for
> the same number of records.
>
> --Dave
>
> On Thu, Mar 11, 2010 at 1:41 PM, Emiliano Romero
> <eromero@sitrack.com>wrote:
>
> > My problem is that I reached the max number of pages, so the only
> > solution seems to be fragmentation.
> >
> > Regards!
> >
> > Emiliano Romero escribió:
> > > Hi list, I'm having a problem with my database. When I try to insert a
>
> > > row in my biggest table i get:
> > > 271: Could not insert new row into the table.
> > > 136: ISAM error: no more extents
> > >
> > > oncheck -pt shows:
> > > Physical Address 4:527
> > > Creation date 01/24/2010 13:19:43
> > > TBLspace Flags 802 Row Locking
> > > TBLspace use 4 bit bit-maps
> > > Maximum row size 24 Number of special
> > > columns 0 Number of keys 0
> > > Number of extents 7 Current serial
> > > value 1 Pagesize (k) 2
> > > First extent size 5000000 Next extent
> > > size 750000 Number of pages allocated 16777215
> > > Number of pages used 16777215 Number of data
> > > pages 16773053 Number of rows 1207659816
> > > Partition partnum 4194396 Partition
> > > lockid 4194396
> > > Extents Logical Page Physical
> > > Page Size Physical Pages
> > > 0 4:5095236 5750000 5750000
> > > 5750000 4:42968656 7500000 7500000
> > > 13250000 4:32405955 750000 750000
> > > 14000000 4:36380420 750000 750000
> > > 14750000 4:39023045 750000 750000
> > > 15500000 4:54801988 750000 750000
> > > 16250000 4:56145738 527215 527215
> > > Indexes are very similar 5-7 extents.
> > > onstat -d shows:
> > > IBM Informix Dynamic Server Version 10.00.FC6 -- On-Line -- Up 44
> > > days 16:37:13 -- 1684560 Kbytes
> > >
> > > Dbspaces
> > > address number flags fchunk nchunks pgsize
> > > flags owner name
> > > 8674ee78 1 0x40001 1 1 2048 N
> > > B informix rootdbs
> > > 879599e8 2 0x40001 2 1 2048 N
> > > B informix physdbs
> > > 87959b80 3 0x42001 3 1 2048 N
> > > TB informix tempdbs
> > > 87959d18 4 0x40001 4 1 2048 N
> > > B informix datadbs
> > > 4 active, 2047 maximum
> > >
> > > Chunks
> > > address chunk/dbs offset size free
> > > bpages flags pathname
> > > 8674f028 1 1 0 2560000
> > > 807158 PO-B /opt/informix/IFMXDATA/rootdbs
> > > 8674fd10 2 2 0 1000000
> > > 499947 PO-B /opt/informix/IFMXDATA/physdbs
> > > 87959028 3 3 0 1000000
> > > 995996 PO-B /opt/informix/IFMXDATA/tempdbs
> > > 879591c8 4 4 0 286346500
> > > 230360798 PO-B /opt/informix/IFMXDATA/datadbs
> > >
> > > and at the end of oncheck -pe I can see:
> > > FREE 58091703
> > > 228254797
> > >
> > > Total Used: 55985702
> > > Total Free: 230360798
> > >
> > > Even with free space, and really far of getting my extent limit, I'm
> > > getting this error. The last extent is a little smaller than what I
> > > set in next extent size. I dont think i get out of contiguous space
> > > because oncheck -pe shows that I have 230360798 pages free.
> > >
> > > Any help should be great.
> > >
> > > Thanks and regards
> > >
> > >
> > > Emiliano Romero
> > >
> >
> >
> >
> >
>
>
> *******************************************************************************
>
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
> >
>
> --00163641661d3d333704818b0918
>
>
>
> *******************************************************************************
>
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

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