Re: Rebuilding MLOG tables

Stephen,

I do it all the time. Actually you don't have to lock the table; you may simply quiesce the table, meaning no transations will be allowed.

Steps:

Quiesce the table
Apply all the pending logs in the deferred trans queue on secondary database Truncate The MLOG$ table.

No issues; in fact I think (note sure) it is supported by Oracle. And it should be; MLOG$ tables are just plain simple tables anyway.

Hope this helps.

Arup Nanda

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Thursday, June 12, 2003 3:54 PM

>
> Among some of the "Rube Goldberg" applications around here, is one that
has
> multiple replication clients that subscribe to a master. For whatever
> reason, we might have a client not update for a while and the MLOG
table(s)
> get big. Then, after that, every update has to read up to sky-high high
> water mark. From the looking around we have done, the thing to do to get
> the HWM back down without rattling replication seems to be (during a time
> when we know no updates are going into the master):
>
> lock table xyz in exclusive mode;
> alter table mlog$_xyz move tablespace over_there;
> alter table mlog$_xyz move tablespace back_here; (optional, I suppose)
> rollback; (release the lock)
>
> Does anyone know of any issues, pitfalls, invitation for disaster, etc.
with
> this?
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> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Stephen Lee
> INET: [EMAIL PROTECTED]
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Arup Nanda
  INET: [EMAIL PROTECTED]

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