Search Postgresql Archives

Re: shared Locks

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Martijn van Oosterhout schrieb:

On Tue, Sep 20, 2005 at 11:18:48AM +0200, Daniel Schuchardt wrote:
So if we want to change a table structure (add a field or sth like this) many clients own AccessShareLock's because it seams that a simple SELECT * FROM table will grant a AccessShareLock and don't release it unitl the connection is terminated. Is that true? Is it is possible to release this lock without a disconnect? {Problem is that about 30 users has to disconnect sometimes. :-( }

I think you'll find that locks are held to the end of the transaction.
You're not holding a transaction open but not doing anything, are you?
Yes you'r right here. Because we use Cursor Fetch, every statement starts a transaction. So your right I tested it and this forces a table lock. Hm... i will look how to do this in another way.

thnx,
Daniel

---------------------------(end of broadcast)---------------------------
TIP 5: don't forget to increase your free space map settings

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux