Performance from buffering

srinivasa gunja · New User Joined: 22 May 2009 Posts: 7 Location: bangalore

hi,

I have a requirement to improve the performance of a job which is using VSAM files. It is a KSDS file and having buffer value of BUFND=50,BUFNI=100.

Is there any scope to achieve performance from buffering

Tnx,
Srini

expat · Posted: Tue Jul 28, 2009 3:03 pm

Understanding what the program does is a good place to start.

Also reading the book in the link below.

VSAM demystified can be found HERE. Please take the time to read it thoroughly.

Robert Sample · Posted: Tue Jul 28, 2009 3:08 pm

It is not likely that additional buffering will have much impact upon the performance of your job -- and performance could actually suffer. You may have to make coding changes to improve performance.