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Old 05-10-2008, 02:02 PM
Lew
 
Posts: n/a
Default Re: db2 connect 4 minut delay after adding partitions

Another thing you might check is make sure that the database is
configured explicitly to authentication server on the client. I
didn't think this was an issue any more but maybe it will help.


On May 8, 7:08 am, danfa...@hotmail.com wrote:
> On May 8, 12:48 pm, Lew <seth...@yahoo.com> wrote:
>
>
>
> > Does it also take that long to activate the database? By changing it
> > to a multipartition database you have increased the memory load on
> > your server. It is possible that you have overallocated memory on the
> > machine causing os paging as the database becomes active

>
> > On May 7, 1:35 am, danfa...@hotmail.com wrote:

>
> > > On May 6, 2:43 pm, Liam Finnie <lfin...@ca.ibm.com> wrote:

>
> > > > On May 6, 7:45 am, danfa...@hotmail.com wrote:

>
> > > > > Hi!

>
> > > > > I have a previous post on the subject that connect takes a long time.

>
> > > > > I uninstalled db2 completely.
> > > > > Installed V9.5
> > > > > Installed fixpack 1
> > > > > created das
> > > > > created an instance
> > > > > installed database sample.
> > > > > Tested to connect to sample from DB2 CC - Worked OK
> > > > > Stopped db2.
> > > > > configured UDB to use Openssh following Liam Finnies step-by-step
> > > > > guide
> > > > > Updated db2nodes.cfg:
> > > > > 0 myhost 0
> > > > > 1 myhost 1
> > > > > 2 myhost 2
> > > > > Started db2
> > > > > tested "db2_all echo hi" and "db2_all db2_all echo hi" OK
> > > > > Tried to connect to db SAMPLE .....................
> > > > > alas, a 4 minute delay from DB2CC or db2 client on other server.
> > > > > Connection via jdbc (DBVisualizer) still works OK
> > > > > Obviously, the partitioning feature or ssh has something to do with
> > > > > the problem.

>
> > > > > We have a similar configuration in our test environment but on V9.1
> > > > > and it works OK.
> > > > > /dg

>
> > > > Hello,

>
> > > > I can't say where the delay is coming from.... but I can say that it's
> > > > not from configuring the server to use ssh. Configuring the server to
> > > > use ssh (via DB2RSHCMD=/usr/bin/ssh) only affects db2start/db2stop
> > > > processing (and commands invoked by db2_all/rah). After that point,
> > > > FCM is used to communicate between the different database partitions.
> > > > So, connecting to a database will not involve ssh (at least on the
> > > > server), so the delay must be coming from somewhere else.

>
> > > > Do you see the same delay if you explicitly select a partition to
> > > > connect to? i.e. 'export DB2NODE=0 ; db2 connect to SAMPLE'? What if
> > > > you replace 'myhost' in your db2nodes.cfg with the fully-qualified
> > > > domain name?

>
> > > > Cheers,
> > > > Liam.- Hide quoted text -

>
> > > > - Show quoted text -

>
> > > Thanks Liam, but none of the suggested changes made any difference.
> > > I will open a PMR
> > > /dg- Hide quoted text -

>
> > - Show quoted text -

>
> Everything works OK locally on the server.
> Note also that connect with jdbc is fast.
> Even though an initial connect has been made in DB2CC (after a 4
> minute delay),
> DB2CC performs a new authentication every now and then and each time
> it takes 4 minutes.
> /dg


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