RE: DD_HASHSIZE , DD

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04-20-2008, 02:59 PM

Colin Dawson

Posts: n/a

RE: DD_HASHSIZE , DD_HASHMAX

This is what I understand the parameters to mean

DD_HASHSIZE = Total number of dictionary hash buckets (should be a
prime number)
DD_HASHMAX = Maximum number of dictionary entries per hash bucket

So you should aim for an even spread of entries / hash bucket

Regards

Colin

There are 10 types of people in the world, those that understand binary and
those that don't

>From: tichman@excite.com
>To: informix-list@iiug.org
>Subject: DD_HASHSIZE , DD_HASHMAX
>Date: 15 Jan 2007 04:39:20 -0800
>
>We are running 7.31.UD3 on Solaris 5.9.I am investigating the optimal
>setting DD_HASHSIZE and DD_HASHMAX. Currenlty they are set at the
>default (31 and 10).We have approximately 430 tables in the database
>but when we run onstat -g dic I get 2400 data dictionary entries which
>seems very high to me. I then noticed that there are multiple entries
>for some of the tables in the onstat -g dic output. Is this normal?
>
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RE: DD_HASHSIZE , DD_HASHMAX