Dennis:

It depends whether you use Dictionary Management or
Local Management for Extent allocation. If you use 
dictionary management you will see the ST enqueue 
contention in X$KSQST (Kernel Services enQueue Statistic
Types) and if it is Locally Managed tablespace you may
find contention for BitMap Blocks (level1?) in the
V$WAITSTAT.


Best Regards,
K Gopalakrishnan

 


-----Original Message-----
WILLIAMS
Sent: Tuesday, November 26, 2002 1:30 PM
To: Multiple recipients of list ORACLE-L


Oracle says that when a file autoextends, there is a slight delay. Does
anyone know which Oracle WAIT statistic that would appear under?
  We have been using autoextend on OLTP production tables for awhile now,
and the results have been satisfactory. This is an ERP system, so the
critical performance time is at month-end. Some of the developers are
concerned that table autoextending may slow batch programs, and suggesting
that I should determine which tables are likely to autoextend during
month-end and add storage beforehand. I would like to ensure that I am
fixing a real problem (short on time, like most of you), so I am wondering
if autoextend was causing a delay, what wait statistic would it show up
under. Any ideas?

Dennis Williams
DBA
Lifetouch, Inc.
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