Swapping in ST02 in Initial Record Buffer rsdb/ntab/irbdsize

[Former Member]

Hello All,

I've been trying to do some tuning in ST02 and was hoping someone might be able to explain why I am getting such a low hit rate on the Initial Records Buffer, and the high level of swapping, when there appears to be plenty free space and plenty free entries.

Here are the stats I see.

Efficiency

HITRATIO % 42

HITS 9,645

REQUESTS 22,790

DB access quality % 42

DB access 13,136

DB access saved 9,645

Reorgs 0

Size

Allocated KB 8,750

Available KB 7,500

Used KB 1,053

Free KB 6,447

Directory entries

Available 10,000

Used 3,801

Free 6,199

Swaps

Objects swapped 9,335

Frames swapped 0

Resets Total 0

Any clues would be much appreciated.

Thanks

Steve

[Former Member]

Hi Steve,

Since no one else ventured a guess here is my opinion. If you look at the current parameter values for all of the NTAB items you notice they all show this: rsdb/ntab/entrycount. They seem to share the directory buffer. For some reason the initial records buffer gets a small portion. I suggest you increase the size of rsdb/ntab/entrycount.

Regards,

Pat

[Former Member]

Thanks for the reply Pat, I might well try that.

Regards

Steve

[Former Member]

I have the same issue and my parameter settings are currently:

rsdb/ntab/irbdsize - 41500

rsdb/ntab/entrycount 45000

Are there any other suggestions? See below for swap information.

Efficiency HITRATIO % 43

HITS 10,243

REQUESTS 23,731

DB access quality % 43

DB access 13,488

DB access saved 10,243

Reorgs 0

Size Allocated KB 42,906

Available KB 41,500

Used KB 4,717

Free KB 36,783

Directory entries Available 11,250

Used 9,759

Free 1,491

Swaps Objects swapped 3,728

Frames swapped 0

Resets Total 0