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IDS Forum

Re: Imported db restore filling rootdbs

Posted By: jpierrot@chubb.com
Date: Thursday, 18 October 2012, at 1:29 p.m.

In Response To: Re: Imported db restore filling rootdbs (Art Kagel)

Hi Fellows,

Just one thing I observed today regarding the below suggestion :
First time I tried that back in August it worked but I just restored th=
at
same instance again today even with the existence of that file (stop) =
it
did fill up or increase the size of my rootdbs. Is it fair to say that =
this
work around is not 100% reliable.

Source instance rootdbs size during backup

prptg@cbsreapdb01(informix):/cbsreapdb01/opt/app/informix
$ onstat-d |grep rootdbs

rootdbs 1/70 0 100000 47316

rootdbs 70/114 0 100000 156

rootdbs 114/0 1000000 150000 77052

47MB in one chunk and 77MB in the other

Target instance rootdbs size after restore

trptg@cbsreapdb02(informix):/cbsreapdb02/opt/app/informix
$ onstat-d |grep rootdbs

rootdbs 1/70 0 100000 26836

rootdbs 70/114 0 100000 156

rootdbs 114/0 1000000 150000 3324

left after restore

26.8MB in one chunk and 3MB in the other

Contents of /cbsreapdb02/opt/app/informix/v11.50.FC7X0/etc/sysadmin
Note : the stop file has been there since August 22nd

drwxrwsr-x 2 informix informix 4096 Jun 23 2011 conv/
-rw-r--r-- 1 informix informix 976 May 25 2011 db_create.sql=

-rw-r--r-- 1 informix informix 22798 May 25 2011 db_install.sq=
l
-rw-r--r-- 1 informix informix 1087 May 25 2011 db_uninstall.=
sql
-rw-r--r-- 1 informix informix 52279 May 25 2011 sch_aus.sql
-rw-r--r-- 1 informix informix 808 May 25 2011 sch_sqlcap.sq=
l
-rw-r--r-- 1 informix informix 28002 May 25 2011 sch_tasks.sql=

-rw-r--r-- 1 informix informix 1031 May 25 2011 start.sql
-rwxr--r-- 1 informix informix 0 Aug 22 13:39 stop*

Please advise!

jp

=

From: "Art Kagel" <art.kagel@gmail.com> =

=

To: ids@iiug.org =

=

Date: 08/22/2012 12:35 PM =

=

Subject: Re: Imported db restore filling rootdbs [28114] =

=

Sent by: ids-bounces@iiug.org =

=

Place a file named "stop" in $INFORMIXDIR/etc/sysadmin that will preven=
t
any tasks from running when you start the restore. If you want tasks
running, you can shutdown the server after the restore completes and ha=
s
been first brought fully online to complete the recovery process, delet=
e
the stop file, and restart the server without it in place.

Art

Art S. Kagel
Advanced DataTools (www.advancedatatools.com)
Blog: http://informix-myview.blogspot.com/

Disclaimer: Please keep in mind that my own opinions are my own opinion=
s
and do not reflect on my employer, Advanced DataTools, the IIUG, nor an=
y
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, Aug 22, 2012 at 12:23 PM, jpierrot@chubb.com
<jpierrot@chubb.com>wrote:

> Using
> IDS11.5.FC7XO,
> Server : AIX .6.1
>
> Each time I restored an instance I can see an increase in rootdbs siz=
e =3D
> of
> about 40MB or more on the average. Once, rootdbs was filled up right =
af=3D
> ter
> the rollforwad of the logs and the instance was blocked. Is this expe=
ct=3D
> ed
> behavior with IDS11.5.FC7X0 ? Has anyone else experienced this ? Rest=
o=3D
> re
> of the same instance under 7.31.UD8 did not do that, whatever the siz=
e =3D
> of
> the rootdbs while the backup was taken, remained the same after the
> restore. Though this behavior is very different with IDS11.5. Any tho=
ug=3D
> hts
> or suggestions on this will be greatly appreciated! Contacted IBM sup=
po=3D
> rt,
> the tech person's answer to me was not acceptable, for he pointed out=
"=3D
> AUS
> 'Automated Update Statistics"
>
> Quote from IBM support " Please be aware that the AUS will activate e=
ve=3D
> ry
> time the server is initialized unless it is deactivated. This results=
i=3D
> n
> evaluation of all the data and updates to the sysadmin database, rega=
rd=3D
> less
> if it was turned on/off on the source server."
> He wanted a test case, can't provide backups due to SOX regulations a=
nd=3D
>
> they contain personal information, that will lead to big violations. =
Th=3D
> ey
> did not offer to dial in to diagnose and debug, that sucks to me. The=
n =3D
> they
> closed the PMR.
>
> 11:33:48 Dataskip is now OFF for all dbspaces
> 11:33:48 Dropping temporary TBLspace 0x100120, recovering 8 pages.
> 11:33:48 Dropping temporary TBLspace 0x100123, recovering 4 pages.
> 11:33:48 Begin recreating indexes deferred during recovery.
> 11:33:48 Recreating index:
> 'sysadmin:"informix".aus_work_info-aus_work_info_idx1'
> 11:33:48 Checkpoint Completed: duration was 0 seconds.
> 11:33:48 Fri May 18 - loguniq 572607, logpos 0xe72620, timestamp:
> 0x27d6bd4f Interval: 31819
>
> 11:33:48 Maximum server connections 1
> 11:33:48 Checkpoint Statistics - Avg. Txn Block Time 0.000, # Txns bl=
oc=3D
> ked
> 0, Plog used 41, Llog used 2
>
> 11:33:48 On-Line Mode
> 11:33:49 Completed recreating indexes.
> 11:33:49 CDR Initialization failed (inactive).
> 11:33:50 SCHAPI: Started dbScheduler thread.
> 11:33:50 Booting Language <spl> from module <>
> 11:33:50 Loading Module <SPLNULL>
> 11:33:50 SCHAPI: Started 2 dbWorker threads.
> 11:33:52 Logical Log 572607 Complete, timestamp: 0x27d6d842.
> 11:33:52 Checkpoint Completed: duration was 0 seconds.
> 11:33:52 Fri May 18 - loguniq 572608, logpos 0x3f018, timestamp: 0x27=
d6=3D
> d87c
> Interval: 31820
>
> 11:33:52 Maximum server connections 1
> 11:33:52 Checkpoint Statistics - Avg. Txn Block Time 0.008, # Txns bl=
oc=3D
> ked
> 0, Plog used 173, Llog used 115
>
> 11:33:53 Logical Log 572607 - Backup Started
> 11:33:53 WARNING: DBspace rootdbs is full
> 11:33:53 Assert Failed: Exception Caught. Type: MT_EX_OS, Context: me=
m
> 11:33:53 IBM Informix Dynamic Server Version 11.50.FC7XO
> 11:33:53 Who: Session(29, informix@, 0, 7000000331e6548)
> Thread(185, dbWorker3, 7000000331a59b0, 4)
> File: mtex.c Line: 417
> 11:33:53 Action: Please notify IBM Informix Technical Support.
> 11:33:53 stack trace for pid 23593076 written
> to /cbpt0atdb03/opt/app/informix/tmp/af.4a16be1
> 11:33:53 See Also: /cbpt0atdb03/opt/app/informix/tmp/af.4a16be1
>
> I had deactivated AUS on the destination server during the restore an=
d =3D
> it
> is still happening. This sounds more like a defect to me. The workaro=
u=3D
> nd
> for future restore were to increase rootdbs on the source instance to=
a=3D
> llow
> room for it to grow during the restore. Which to me seems silly......=
.I=3D
>
> don't see that as an alternative, while one can be in a situation whe=
re=3D
> you
> have to restore the db unexpectedly. One thing I notice, in that part=
ic=3D
> ular
> instance, is that the rollforward of the logs contain a lot of recrea=
ti=3D
> ng
> of indexes, due to nightly bacth jobs dropping and recreating indexes=
t=3D
> hat
> are logged. Though this practice is not new, it was there under 7.31 =
wi=3D
> th
> no negative impact. Is there any change in onbar algorithm between ID=
S7=3D
> ..x
> and IDS11.x.
>
> I look forward into reading your much anticipated answers.
>
> Regards,
>
> jp
> =3D
>
>
>
>
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