Re: deleted records in file causing performance problem

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Joel--

In contrast to what some others have said, if you're reading the file sequentially (in record arrival sequence), the deleted records -could- be causing your delay in reading the file.

We have a file of only about 3 million records with about 1/2 deleted, and we've noticed a difference using the DBU utility-- try to read by relative record number (ie record arrival sequence), and you can wait a minute or two until the utility has read enough active records to fill a screen. Access by a logical file, and a screen full of data is available 'instantly.'

Depending on where the deleted records in your file are, this could explain your delays.

--Paul E Musselman
PaulMmn@xxxxxxxxxxxxxxxxxxxx

Joel jotted (in part):

I have a 30 million record file with 20% deleted records.
Some users are experiencing delays (up to 1 minute) in a critical RPG
interactive order entry program.
I can't seem to find an IBM utility to help diagnose the error.
I think the problem could be lots of deleted records in a file that the
program is performing a SETLL on to check for record existence.

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Re: deleted records in file causing performance problem - HELP!!