[AccessD] Page Locking Happening - But Set to Record Locking

Jim Dettman jimdettman at verizon.net
Fri Mar 6 15:23:05 CST 2009


Dan,

  Here's the link to the article (http://support.microsoft.com/kb/306435)
and William is 100% correct that it is not a bug in the traditional sense,
but rather "by design" 
  
  I always refer to it as a bug though because I consider it to be broken.
When you modify something as fundamental as locking in a database product, I
think it's unconscionable when you don't have it working right out of the
gate and you know about it!  Especially given that DAO was still the best
object lib for working with JET databases.

Jim.

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Dan Waters
Sent: Thursday, March 05, 2009 9:35 PM
To: 'Access Developers discussion and problem solving'
Subject: Re: [AccessD] Page Locking Happening - But Set to Record Locking

Wow!  That's a head-turner!

I do have to say that I haven't seen this behavior in Access 2002 or 2003.
So perhaps they did fix it in those versions.  But this client uses Access
2000.

And yes - if you can give me a lead to the KB article I will be in your
debt!  I don't know how but it's a good sentiment!  :-)

Thanks!
Dan

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Jim Dettman
Sent: Thursday, March 05, 2009 6:58 PM
To: 'Access Developers discussion and problem solving'
Subject: Re: [AccessD] Page Locking Happening - But Set to Record Locking

Dan,

  Even though you are set for "record level" locking, not all operations are
done at that level.  Index updates, memo pages, DML operations, etc. are
always done at page level.

  Also the first user in must be set for record level locking otherwise
everyone defaults to page level regardless of setting.

  There is also a bug where DAO in code will not record level lock unless
you first open a recordset in ADO.  There is a MSKB article on that which I
can dig out if you want.

Jim. 

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Dan Waters
Sent: Thursday, March 05, 2009 6:11 PM
To: 'Access Developers discussion and problem solving'
Subject: [AccessD] Page Locking Happening - But Set to Record Locking

Twice now I've seen what appears to be page locking in the BE mdb when that
file is set to record locking.  About 8 contiguous records show locking -
reminds me of Access 97, but they are using Access 2000.

Has anyone seen this before or know of a fix?

Thanks!
Dan





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