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Key: CORE-3323
Type: Improvement Improvement
Status: Closed Closed
Resolution: Fixed
Priority: Major Major
Assignee: Vlad Khorsun
Reporter: Vlad Khorsun
Votes: 0
Watchers: 0
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Firebird Core

Ability to cancel waiting in lock manager

Created: 02/Feb/11 08:38 AM   Updated: 03/Dec/12 09:37 AM
Component/s: Engine
Affects Version/s: None
Fix Version/s: 2.5.1, 3.0 Alpha 1

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 Description  « Hide
Consider following example :

tx1: update table t ... where id = 1
tx2: update table t ... where id = 1

If tx2's is in WAIT mode, it will wait for end of tx1 forever and this wait can't be breaked nor using DELETE FROM MON$xxx, nor using fb_cancel_operation.

The improvement is to make lock manager able to break such endless waitings.

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