much more rare then expected and if the database was properly configured (user data,temp, rbs, data dictionary separated from each other) it was highly unlikely that coalescing will be useful. Locally
managed (bit mapped) tablespaces took care of the problem. Now, we can
start defragmenting and stop living.
On 10/27/2003 01:34:25 AM, Cary Millsap wrote:
You mean "make your PCTINCREASE 0 so that SMON will *not* coalesce them." Right? Some comments:
- You don't want SMON coalescing your tablespaces. It is a complete waste of time. Oracle coalesces on demand during a CREATE statement. - The SMON coalesce feature was added under protest by the smart people in Server Technologies development, in response to pressure from Marketing and Support so that the Oracle RDBMS would look better in brochures. - Thank goodness the developers made SMON smart enough to *not* coalesce freespace in any tablespace with PCTINCREASE set to 0 (which is what it *should* be set to almost everywhere). - You can turn off SMON's ridiculous CPU-consuming, lock-holding behavior by setting event 10269.
Cary Millsap Hotsos Enterprises, Ltd. http://www.hotsos.com
Upcoming events: - Performance Diagnosis 101: 10/28 Phoenix, 11/19 Sydney - SQL Optimization 101: 12/8-12 Dallas - Hotsos Symposium 2004: March 7-10 Dallas - Visit www.hotsos.com for schedule details...
-----Original Message----- Mladen Gogala Sent: Sunday, October 26, 2003 8:09 PM To: Multiple recipients of list ORACLE-L
Well, having in mind that you're working on version 7 (chuckle) , you
should
make your tablespaces have PCTINCREASE 0 (alter tablespace default
storage...)
so SMON will coalesce them. You may also try (I'm not sure whether
this
has
existed before 7.3) with alter tablespace coalesce, which should mark
the
tablespace to be coalesced by SMON at he first opportunity. I'm afraid
that
PCTINCREASE 0 is your best option.
On 2003.10.26 20:04, Ross Collado wrote:
> Hi,
> For those like me still working on an Oracle 716 (hold the laughs),
how do
> we coalesce a tablespace?
> Rgds,
> Ross
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Ross Collado
> INET: [EMAIL PROTECTED]
>
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-- Mladen Gogala Oracle DBA -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Mladen Gogala INET: [EMAIL PROTECTED]
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Mladen Gogala Oracle DBA
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