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IDS Forum

Re: IDS 12.10- BEST PRATICES Database Design

Posted By: Spokey Wheeler
Date: Tuesday, 12 April 2016, at 8:35 a.m.

In Response To: IDS 12.10- BEST PRATICES Database Design (MOHD FADZIL JUSOH)

Don't put your indexes in separate dbspaces, they will become a bottleneck

Sent from my iPad

> On 11 Apr 2016, at 14:01, MOHD FADZIL JUSOH <fadzil@isianpadu.com> wrote:
>
> Hi,
>
> We are plan to do database reorganize to follow best practices database design
> from IBM to get best performance for our database.
>
> Our design as below:
> (all dbspaces size 2K)
> rootdbs - 1
> logdbs - 1, allocated log file
> phydbs - 1, allocated physical log
> datadbs - 7, allocated data
> indexdbs - 4, allocated index table
> tempdsb - 4, allocated tempdbs
>
> Refer our onstat -d ouput as below:
>
> IBM Informix Dynamic Server Version 12.10.FC6AEE -- online -- Up 00:00:01 --
> 12389868 Kbytes
>
> Dbspaces
> number flags fchunk nchunks flags owner name
> 1 40001 1 1 N B informix rootdb
> 2 40001 2 1 N B informix phydbs
> 3 40001 3 1 N B informix logdbs
> 4 42001 4 1 N TB informix tempdbs1
> 5 42001 5 1 N TB informix tempdbs2
> 6 42001 6 1 N TB informix tempdbs3
> 7 42001 7 1 N TB informix tempdbs4
> 8 40001 8 2 N B informix datadb1
> 9 40001 9 1 N B informix datadb2
> 10 40001 10 1 N B informix datadb3
> 11 40001 11 1 N B informix datadb4
> 12 40001 12 1 N B informix datadb5
> 13 40001 13 3 N B informix datadb6
> 14 40001 14 2 N B informix datadb7
> 15 40001 15 1 N B informix datadb8
> 16 40001 16 1 N B informix idxdbs1
> 17 40001 17 3 N B informix idxdbs2
> 18 40001 18 2 N B informix idxdbs3
> 19 40001 19 1 N B informix idxdbs4
>
> Chunks
> chk/dbs offset size free bpages flags pathname
> 1 1 0 1000000 984577 PO-B /dev/vg00/elixir/rootdb
> 2 2 0 500000 249947 PO-B /dev/vg00/elixir/phydbs
> 3 3 0 10000000 9249947 PO-B /dev/vg00/elixir/logdbs
> 4 4 0 2500000 2499897 PO-B /dev/vg00/elixir/tempdbs1
> 5 5 0 2500000 2499897 PO-B /dev/vg00/elixir/tempdbs2
> 6 6 0 2500000 2499897 PO-B /dev/vg00/elixir/tempdbs3
> 7 7 0 2500000 2499897 PO-B /dev/vg00/elixir/tempdbs4
> 8 8 0 10000000 0 PO-B /dev/vg00/elixir/datadb1
> 9 9 0 10000000 3830913 PO-B /dev/vg00/elixir/datadb2
> 10 10 0 10000000 2633307 PO-B /dev/vg00/elixir/datadb3
> 11 11 0 10000000 2709573 PO-B /dev/vg00/elixir/datadb4
> 12 12 0 10000000 3830913 PO-B /dev/vg00/elixir/datadb5
> 13 13 0 10000000 19 PO-B /dev/vg00/elixir/datadb6
> 14 14 0 10000000 3125 PO-B /dev/vg00/elixir/datadb7
> 15 15 0 10000000 4374729 PO-B /dev/vg00/elixir/datadb8
> 16 16 0 10000000 6433758 PO-B /dev/vg00/elixir/idxdbs1
> 17 17 0 10000000 261 PO-B /dev/vg00/elixir/idxdbs2
> 18 18 0 10000000 562711 PO-B /dev/vg00/elixir/idxdbs3
> 19 19 0 10000000 2878822 PO-B /dev/vg00/elixir/idxdbs4
> 20 17 0 2500000 288 PO-B /dev/vg00/elixir/idxdbs21
> 21 8 0 10000000 3425631 PO-B /dev/vg00/elixir/datadb12
> 22 17 0 10000000 6085694 PO-B /dev/vg00/elixir/idxdbs22
> 23 13 0 2500000 0 PO-B /dev/vg00/elixir/datadb61
> 24 18 0 2500000 1600906 PO-B /dev/vg00/elixir/idxdbs31
> 25 13 0 10000000 9146000 PO-B /dev/vg00/elixir/datadb62
> 26 14 0 10000000 9160827 PO-B /dev/vg00/elixir/datadb71
>
> Based on our design, we follow best practices or not? We plan to move all
> index table into 1 dbspaces from 4 dbspaces, can improve performance or not?
> Any document from IBM as references for us how to design our database follow
> best practices. Please help.
>
> Thank You
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>

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