Understanding this criterion now, and I'm afraid the list of counter measures and precautions in that extra article is very exhaustive already and I'd not have any idea beyond that.
Original Message:
Sent: Wed April 10, 2024 01:50 PM
From: Gábor Fekete
Subject: Reserved page size in rootdbs
Hi Andreas!
There was an IBM notification about this potential data loss almost a month ago and there was a mention about a extented reserved page size criteria.
"How to identify the tables or indexes that are at risk
Examine the output of "oncheck -pe rootdbs" to identify extended reserved page extents that are larger than 32 pages"
Notification and additional details pertaining to APAR IT45318
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Gábor Fekete
Software Engineer
Capital Systems
Budapest
Original Message:
Sent: Wed April 10, 2024 01:41 PM
From: Andreas Legner
Subject: Reserved page size in rootdbs
Hi Gábor,
what exactly do you mean by "EXTENDED RESERVED PAGES size > 32 criteria" - it seems your reasoning hinges on this, but I don't see it mentioned in the APAR IT45317.
BR,
Andreas
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Andreas Legner
Original Message:
Sent: Wed April 10, 2024 04:17 AM
From: Gábor Fekete
Subject: Reserved page size in rootdbs
Hi
I'm looking for some information about the Reserved pages size calculation method.
Our customers upraded/upgrading to 14.10FC9 or 14.10FX9W1 and we want to eliminate the risk of data loss.
IT45318: POTENTIAL FOR DATA LOSS OR INDEX PROBLEMS IN TABLES LOCATED IN ROOT DBSPACE WHEN EXTENDED RESERVED PAGES ARE IN USE
One customers system is currently not meet with the EXTENDED RESERVED PAGES size > 32 criteria, so we think they will safe with upgrading to FC9W1. (only system databases located in the rootdbs) But our question is when will create the engine bigger then 32 page size RESERVED PAGES in the future? I didn't found any resource about this.
The customer with 14.10FC9 has a potential risk because we found some RESERVED PAGES witch bigger then 32 pages and the next pages containing some system database data. We will suggest them to upgrade to 14.10.FC10W2, and until they will upgrade to it we will configure the bufferpools maxdirty parameter to very low value. 5 or less.
Any good practice or advice to lowering the risk the data lost?
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Gábor Fekete
Software Engineer
Capital Systems
Budapest
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