Thread: CICS

Protected entry threads for DB2 - worth enabling?

Started by Dave • user2 replies136 viewsLast activity 3 weeks ago
Post #1
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Dave
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Posted: Jun 16, 2026, 1:36 PM

Noticed our CICS regions do not use protected entry threads for DB2 attach. IBM docs mention tradeoffs with thread reuse and post-TPS lock behavior.

For a region doing steady OLTP with moderate DB2 calls, is turning protected threads on usually a win or a headache?

Post #2
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Sandra
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Posted: Jun 16, 2026, 8:36 PM

We enabled it on two pilot regions. CPU dropped a little on high volume transactions. Took a while to tune pool sizes afterward.

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