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IDS Forum

RE: To change extent and next size of huge table

Posted By: Clifton Bean
Date: Friday, 18 August 2006, at 10:56 a.m.

In Response To: Re: To change extent and next size of huge table (Kern Doe)

You might want to investigate the ALTER FRAGMENT (INIT) command. Since the
first extent is really only used when the table is first generated, just
specify a dbspace that you know has enough room to not fragment the table
during your move of it.

Take care.
Clifton

-----Original Message-----
From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of Kern
Doe
Sent: Friday, August 18, 2006 9:40 AM
To: ids@iiug.org
Subject: Re: To change extent and next size of huge table [7300]

There is no other way to change the first extent of a table except for
rebuilding it with the modified schema. Perhaps something in your unloaded
data that could be the same as the delimiter. To make thing simple, can you
try to unload it again to a single file using different delimiter? And also
do
oncheck on this table first, just to see if it is healthy.

MOHD SHANI SHAFIE <mshafie2@gmail.com> wrote:
Hi,

Dbschema a table that has 24,017 recored generated the followings -
==========
{ TABLE "informix".bss_mq_out row size = 32548 number of columns = 9 index
size = 46 }
create table "informix".bss_mq_out (

msg_ref_no char(20), UNL-01

trans_code char(8), UNL-01

proc_dt datetime year to second, UNL-01

ret_cd_1 smallint, UNL-01

ret_cd_2 smallint, UNL-01

mssg_hdr char(400), UNL-02

mssg_dtl char(32000), UNL-03

app_res_cd char(8), UNL-01

err_mssg char(100) UNL-04
) in datadbs2 extent size 2048 next size 1024 lock mode row;
revoke all on "informix".bss_mq_out from "public";

create index "informix".i1_bss_mq_out on "informix".bss_mq_out (trans_code,

proc_dt) using btree in datadbs2 ;
create index "informix".i_bss_mq_out on "informix".bss_mq_out (msg_ref_no)

using btree in datadbs2 ;
==========
Please do not aks me who agreed to the table/field/size in the first place.

In view of the huge table size, we need to change the extent size and next
size to other values and to re-org the table.

We plan to unload, drop, re-create and load again (reorg table)
However, the unload to single unl does not look good, records count and unl
do
not tally.

Then we unloaded to 4 unl files as noted above.

Again the records count and unl do not tally for UNL-02 and UNL-04. We
suspect
the field size mssg_dtl (char 32000) is too big to unload but it does not
answer for UNL-02.

Is there other (better) way to change the extent & next size (re-org table)
?

Your sugestion is very much appreciated.

Regards.

Shani

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