This slide deck talks about the performance improvements using Workload Manager

1. DB2’S GOT

2. MASTER DB PERFORMANCE
WITH WLM
Raja

3.  DB2 V10.1 on AIX
 Hybrid multi TB Database
 Tables with 3080761021 rows (> 3 Billion)
Failure of reports (36%)
 Business user (Sponsor) queries – SLOW (41%)
Problem Statement

4. First Impression

5. INVESTIGATION
 H/W as per Firm standards
Load on DB increased
 DBA’s killing low priority sessions
 Resource hogging on the server
Business users were NOT happy

6. DB2 WLM is a functionality that
o Maintains SLA’s
o Prevents resource hogging
o Optimizes system to avoid overload
o Controls, monitors and analyses DB activity
Workload Manager …… in a nutshell

7.  DB2 WLM introduces the entities called
o Service Super Class – Logical Grouping of SC
o Service class
o Threshold
o
o
o
WLM…… continued

8.  Service class - Applies Conditions
WLM…… continued
 Threshold – Sets Limits

9.  DATA TAG – Tag for the data (New Feature in 10.1)
o CREATE TABLESPACE "VOTE_4RAJA“
.... .... DATA TAG 1...;
o ALTER TABLESPACE "VOTE_4RAJA“
... ... DATA TAG 1 ....;
WLM……new functionality

10.  CREATE SERVICE CLASS CLASS1
 CREATE SERVICE CLASS “LOW_PRIORITY“ UNDER “CLASS1“ .....
CPU LIMIT 25
PREFETCH PRIORITY LOW
BUFFERPOOL PRIORITY LOW;
 CREATE SERVICE CLASS “HIGH_PRIORITY“ UNDER “CLASS1” …..
CPU LIMIT NONE
PREFETCH PRIORITY HIGH
BUFFERPOOL PRIORITY HIGH
WLM DDL

11.  CREATE THRESHOLD "LOW_TO_HIGH"
FOR SERVICE CLASS “LOW_PRIORITY"
WHEN DATATAGINSC IN (1,...)
REMAP ACTIVITY TO “HIGH_PRIORITY“
 ALTER THRESHOLD ………
……………………………
WHEN DATATAGINSC IN (1,...)
REMAP ACTIVITY TO “HIGH_PRIORITY“
WLM DDL

12. WLM……continued
LOW_PRIORITY SC
HIGH_PRIORITY SC
T
H
R
E
S
H
O
L
D
NOYES
DATA
TAG TBSP
Optimizer

13. First ImpressionBest Impression

14.  Streamlined resource usage
 Sponsor queries given priority – No failures
 Reports generation for priority data on time
New Features offer multiple solutions
Happy Customer
UsefulLink:
http://publib.boulder.ibm.com/infocenter/db2luw/v10r1/topic/com.ibm.db2.luw.wn.doc/doc/c0052271.html

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