The K Guy - Latest Comments

Re: About

Kenneth Lam — Thu, 13 Oct 2011 16:16:42 -0000

Thank You for sharing DB2TOP information. It help me alots. Thanks You again.

Re: db2top Sessions Screen (Part 1)

Kishorissai — Tue, 20 Sep 2011 00:40:12 -0000

one of the best documents on DB2TOP , This helps to understand db2top in depth

Re: db2top Bottlenecks Screen (Part 1)

Debasis11 — Mon, 05 Sep 2011 02:20:42 -0000

Ya Keith...thanks a lot for the post...Can you please tell us what value is good and what value is bad for each parameters for a database when you get some time...thanks

Re: db2top Performance Report

thekguy — Fri, 27 May 2011 07:24:32 -0000

Hi Andrew,

The performance impact is comparable to taking a snapshot every x seconds, where x is what you've configured as db2top's interval. The newer monitoring table functions in DB2 9.7 don't have nearly the performance impact of a snapshot, but db2top uses the old snapshot APIs.

Keith

Re: db2top Performance Report

AndrewWang1 — Fri, 27 May 2011 03:32:10 -0000

Hi, K

New to db2top, it looks GREAT.
But how is the performance impact during collecting on PRODUCTION environment ? Thanks.

Best
Andrew

Re: db2top Sort

The Art Of War — Sat, 16 Apr 2011 05:18:37 -0000

Great resource . . . I used to know a little bit about databases, but haven't really had much need for them personally for years, and now I've got a big project to work on and need to refresh my memory.

Re: db2top Sessions Screen (Part 1)

Vijay — Thu, 31 Mar 2011 10:12:37 -0000

How effectively SYSIBMADM views can used for DBA activities?

Re: How Inception is like metaprogramming

Prithwis Mukerjee — Tue, 07 Sep 2010 01:22:49 -0000

Recursive reality can be also be envisioned in the manner shown in this video http://www.youtube.com/watch?v...

Re: db2top -C and db2top -f

thekguy — Thu, 02 Sep 2010 18:38:38 -0000

It now comes packaged with every copy of DB2 for Linux and Unix as of version 9.1 FP6, version 9.5 FP2, and version 9.7.

Re: db2top -C and db2top -f

Neistv — Thu, 02 Sep 2010 18:15:58 -0000

where is db2top now. I can't find the site for download now.

Re: db2top Watch

thekguy — Tue, 24 Aug 2010 13:35:25 -0000

Thanks for taking the time to comment. I'm glad you like the blog!

Re: db2top Watch

watch storage — Tue, 24 Aug 2010 13:23:58 -0000

This is the great blog, I'm reading them for a while, thanks for the new posts!

Re: How Inception is like metaprogramming

Asda — Wed, 04 Aug 2010 07:31:04 -0000

just incase

Re: Metaprogramming in SQL (Part 1)

thekguy — Thu, 01 Jul 2010 22:45:24 -0000

Hi arzvi,

I guess that, according to the Wikipedia definition, probably just about any practical use of dynamic SQL would count as metaprogramming. When I think of some of the examples of metaprogramming I've seen in languages like Ruby though, they seem to take things much further, which is what I'm hoping to demonstrate is possible in SQL with this series of blog posts. Thank you for your comment.

Re: Metaprogramming in SQL (Part 1)

arzvi — Fri, 25 Jun 2010 14:30:34 -0000

I always allow db2 to generate sql when doing monotonous dba activities like 'select 'set integrity for ' || tabschema || '.' || tabname || ' immediate checked;' from syscat.tables where status='C'
I think this borders on meta programming

Re: db2top: How to change column order and preserve it in the next session

thekguy — Mon, 21 Jun 2010 19:32:17 -0000

Thanks for letting me know. I have now added a link directly to the YouTube video, so if you can see videos on YouTube, you should be able to see this one.

Re: db2top: How to change column order and preserve it in the next session

Calmer123 — Mon, 21 Jun 2010 19:14:27 -0000

can not see the video?

Re: 8 Simple Steps To Improve Your Writing

Stevage — Mon, 14 Jun 2010 22:38:14 -0000

I'm blown away by how much easier it is to read (particularly, skim-read) your rewritten example about "u"s.

Re: New in DB2 for LUW 9.7.2: UDF default parameters

Peter — Tue, 08 Jun 2010 14:46:50 -0000

Awesome ! Thanks for the info

Re: db2top Filters

Peter — Tue, 25 May 2010 10:03:38 -0000

Great Info ! Thanks for this excellent blog and information on "db2top"

Re: db2top Watch

arzvi — Mon, 17 May 2010 07:28:38 -0000

Please expand the article by adding examples, I couldn't figure out how to make the Watch screen write the agent's sqls or even the db structure.

Re: Table of Contents Page for db2top

Frederik Engelen — Fri, 14 May 2010 08:34:44 -0000

Thanks for this series, they've already been very helpful.

Re: db2top Bottlenecks Screen (Part 1)

PAul — Sat, 08 May 2010 00:51:04 -0000

Hello Keith! I really like your posts, but I have no clear When a value (for the gauges) is good for the database and when it is bad?
For this post it is clear (it is very obvious), but not for all other posts

If you have time, please could you give examples in your posts?

Regards,

Re: db2top Memory Screen (Part 1)

thekguy — Sun, 18 Apr 2010 15:38:11 -0000

Hi Joachim,

Thank you for your comment. You are correct that the db2top Memory screen sums the memory of the FCMBP pool across all partitions. This is true for all pool types. I am updating the post to take this into account.

Re: db2top Memory Screen (Part 1)

Joachim Müller — Fri, 16 Apr 2010 09:25:06 -0000

Hello Keith,

Thanks fist to you for the very good explanation. I've learned a lot about db2top.
The FCMBP memory pool is not correct. What we see, is that we have to divide the Memory Pool by the number of
partitions. See out output:
[-]15:22:44,refresh=2secs(0.202) Memory AIX,part=[16/16],DB2TBP:TBP
[d=Y,a=N,e=N,p=ALL] [qp=off]

┌──────────────┬────────────┬────────────┬────────────┬───────────┐
Self Tuning......: Off │ │ 25%│ 50%│ 75%│ 100%│ Sort Heap........: 0
Sort HWM.........: 0 │Memory hwm% │--------------------------------------------------│ Private Mem......: 610.7M
Lock List........: 355.4K │Sort Heap% │ │ Private Sort.....: 0
Shared Sort......: 488.0K │Mem Skew% │ │ Shared Sort HWM..: 474.2M
Private Work HWM.: 0 │Pool Skew% │ │ PkgCache HWM.....: 776.5M
Catalog Cache HWM: 20.0M └──────────────┴──────────────────────────────────────────────────┘ Shared Work HWM..: 0

Memory Memory Percent Current High Percent Maximum # of
Type Level Pool Total Size WaterMark Max Size Pool(s)
----------- ---------- -------------------- ------- ------------ ------------ ------- ------------ -------
Instance DB2TBP Monitor 0.01% 6.3M 6.3M 105.21% 6.0M 16
Instance DB2TBP FCMBP 69.16% 52.0G 52.0G 3982.23% 1.3G 16
Instance DB2TBP Other 23.86% 17.9G 17.9G 375.98% 4.7G 16
Database TBP Applications 0.23% 178.4M 257.8M 28.35% 629.5M 1259
Database TBP Database 1.25% 965.6M 965.8M 60.18% 1.5G 16
Database TBP Lock Mgr 0.77% 595.1M 595.1M 99.83% 596.1M 16
Database TBP Utility 0.00% 2.3M 320.4M 0.37% 625.0M 16
Database TBP Package Cache 1.40% 1.0G 1.2G 3.30% 32.0G 16
Database TBP Catalog Cache 0.09% 72.2M 75.8M 0.01% 512.0G 16
Database TBP Other 0.00% 3.0M 3.0M 0.94% 320.0M 16
Database TBP BufferPool 2.78% 2.0G 2.0G 0.07% 3.0T 96
Database TBP SharedSort 0.05% 34.9M 392.2M 6.56% 532.5M 16
Database TBP ApplShrHeap 0.09% 65.7M 92.6M 5.26% 1.2G 16
Application TBP Applications 0.23% 178.4M 257.8M 28.35% 629.5M 1259
Application TBP Other 0.08% 58.0M 73.6M 0.00% 4.5T 147

There is 52 GB of FCMBP, to much. we have only 32GB physical memory.

Thanks again and have a nice weekend.

I looking forward to see your next db2top screen;-)

Best regards,
Joachim Müller