InfoSphere DataStage: Parallel Job Performance Issue on Redhat Linux 6.1 System

Technote (troubleshooting)


Problem(Abstract)


On the RedHat Enterprise Linux 6.1 operating system, parallel jobs run with degradated performance.

Symptom

On RedHat Linux 6.1 system there is a 10 - 90% performance degradation depending on the hardware configuration and DataStage node configuration during parallel job runs. Increase in number of CPU cores and DataStage node counts used on the system leads to more performance degradation.


Cause

This is caused by Parallel jobs using transformer stages and use of the CurrentTimestampMS() function in the transformer stage on the Redhat Linux 6.1 system.

Resolving the problem

On the computer that has the Redhat Enterprise Linux 6.1 operating system installed, set the environment variable as follows:
TZ=:/etc/localtime
before running parallel jobs. The CPU time improves.


Cross reference information
Segment Product Component Platform Version Edition
Information Management InfoSphere Information Server Linux 8.7

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Document information


More support for:

InfoSphere DataStage

Software version:

8.7, 9.1

Operating system(s):

Linux

Reference #:

1598208

Modified date:

2014-09-04

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