Commit Graph

11 Commits

Author SHA1 Message Date
Tom Lane
863aceb54f Get rid of PID entries in shmem hash table; there is no longer any need
for them, and making them just wastes time during backend startup/shutdown.
Also, remove compile-time MAXBACKENDS limit per long-ago proposal.
You can now set MaxBackends as high as your kernel can stand without
any reconfiguration/recompilation.
2001-09-07 00:27:30 +00:00
Tom Lane
d8d9ed931e Add support to lock manager for conditionally locking a lock (ie,
return without waiting if we can't get the lock immediately).
Not used yet, but will be needed for concurrent VACUUM.
2001-06-22 00:04:59 +00:00
Tom Lane
6cc842abd3 Revise lock manager to support "session level" locks as well as "transaction
level" locks.  A session lock is not released at transaction commit (but it
is released on transaction abort, to ensure recovery after an elog(ERROR)).
In VACUUM, use a session lock to protect the master table while vacuuming a
TOAST table, so that the TOAST table can be done in an independent
transaction.

I also took this opportunity to do some cleanup and renaming in the lock
code.  The previously noted bug in ProcLockWakeup, that it couldn't wake up
any waiters beyond the first non-wakeable waiter, is now fixed.  Also found
a previously unknown bug of the same kind (failure to scan all members of
a lock queue in some cases) in DeadLockCheck.  This might have led to failure
to detect a deadlock condition, resulting in indefinite waits, but it's
difficult to characterize the conditions required to trigger a failure.
2000-12-22 00:51:54 +00:00
Bruce Momjian
52f77df613 Ye-old pgindent run. Same 4-space tabs. 2000-04-12 17:17:23 +00:00
Bruce Momjian
5a017b96ad Apply contrib patch from Massimo 1999-09-27 20:04:14 +00:00
Bruce Momjian
27b8143944 Hi,
I have updated my contrib code for version 6.5. In the attachment you will
find the directories array, datetime, miscutil, string, tools and userlocks
which replace the corresponding directories under contrib.

In contrib/tools you will find some developement scripts which I use while
hacking the sources. I hope they will be useful for some other people.

I have also added a contrib/Makefile which tries to compile and install all
the contribs. Unfortunately many of them don't have a Makefile or don't
compile cleanly.

--
Massimo Dal Zotto
1999-06-05 19:09:48 +00:00
Vadim B. Mikheev
bbf37e9477 typedef struct LTAG
{
    Oid             relId;
    Oid             dbId;
    union
    {
        BlockNumber     blkno;
        TransactionId   xid;
    }               objId;
>
> Added:
>    /*
>     * offnum should be part of objId.tupleId above, but would increase
>     * sizeof(LOCKTAG) and so moved here; currently used by userlocks only.
>     */
>    OffsetNumber    offnum;
    uint16          lockmethod;     /* needed by userlocks */
} LOCKTAG;

gmake clean required...
User locks are ready for 6.5 release...
1999-06-01 09:35:39 +00:00
Bruce Momjian
07842084fe pgindent run over code. 1999-05-25 16:15:34 +00:00
Marc G. Fournier
eec4c7366f From: Massimo Dal Zotto <dz@cs.unitn.it>
Here is a tar file the new directories, which substitute the old ones
in contrib. Please remove the old directories array, datetime, miscutil,
string and userlock before unpacking the tar file in contrib.

Note that as the modules are now installed in lib/modules I install all
my sql code in lib/sql. In my opinion also the other contributors should
follow these rules.
1998-08-30 19:37:51 +00:00
Bruce Momjian
a32450a585 pgindent run before 6.3 release, with Thomas' requested changes. 1998-02-26 04:46:47 +00:00
Bruce Momjian
951986c550 Update of contrib stuff from massimo. 1997-11-05 21:38:25 +00:00