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RE: SYS.HIST_HEAD$ defrag?

From: Herring Dave - dherri <>
Date: Thu, 23 Aug 2007 07:47:07 -0500
Message-ID: <>


Deleting the stats then dropping takes about 10 minutes on average, so yes that's a much better option. I've got that set up now via a BEFORE DDL trigger which checks for this specific table. Actually, per your mention, I'm researching gathering GLOBAL instead of ALL for granularity. For some dumb reason I never considered/tested that.

With 9i, I'm just not willing right now to put more time/investment into it. We badly need to upgrade our ODS to 10g. If I try to hash this issue out with Oracle, I'll have to spend about 1 month of time to get them to admit its a bug, then wait x amount of time for a fix, then test on our side, get proper approvals for migration of the patch to our integration test, then eventually production. 9i is desupported as of 8/08 I believe, so our goal is to have all our dbs on 10g by then. (Maybe too much detail, but had to get that out).


David C. Herring, DBA | A c x i o m Delivery Center Organization

630-944-4762 office | 630-430-5988 wireless | 630-944-4989 fax

> -----Original Message-----
> From: [] On Behalf Of Alex
> Gorbachev
> Sent: Thursday, August 23, 2007 7:32 AM
> To: Herring Dave - dherri;
> Subject: Re: SYS.HIST_HEAD$ defrag?
> Is performance of deleting stats acceptable or close?
> Does it have the same problem statement?
> If that solved in 10g - they might be able to port it back to
> If 10g is exposed they might still solve it and port back. It all
> depends if you have a valid business reason for that. 9.2 is still
> fully supported. Right?

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Received on Thu Aug 23 2007 - 07:47:07 CDT

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