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Patch from Massimo Dal Zotto <dz@cs.unitn.it>

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The following patches add to the backend a new debugging flag -K which prints
a debug trace of all locking operations on user relations (those with oid
greater than 20000). The code is compiled only if LOCK_MGR_DEBUG is defined,
so the patch should be harmless if not explicitly enabled.
I'm using the code to trace deadlock conditions caused by application queries
using the command "$POSTMASTER -D $PGDATA -o '-d 1 -K 1'.
The patches are for version 6.0 dated 970126.
This commit is contained in:
Marc G. Fournier
1997-02-12 05:25:13 +00:00
parent ba82bb3eac
commit fb70587c1d
4 changed files with 161 additions and 40 deletions
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6
src/include/storage/lock.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: lock.h,v 1.3 1996/11/05 06:11:00 scrappy Exp $
* $Id: lock.h,v 1.4 1997/02/12 05:25:13 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@@ -211,4 +211,8 @@ extern bool LockReleaseAll(LockTableId tableId, SHM_QUEUE *lockQueue);
extern int LockShmemSize(void);
extern bool LockingDisabled(void);
#ifdef DEADLOCK_DEBUG
extern void DumpLocks(void);
#endif
#endif /* LOCK_H */