RE: db file sequential read

From: VIVEK_SHARMA <VIVEK_SHARMA_at_infosys.com>
Date: Tue, 19 Nov 2002 23:34:02 -0800
Message-ID: <F001.00507918.20021119233402@fatcity.com>

For "db file sequential read wait" Add Following to /etc/system On UFS
Setting maxphys=8388608
On VXFS
set vxio:vol_maxio = 16384 ( implies 8MB )

-----Original Message-----
[mailto:Charlie_Mengler_at_HomeDepot.com]
Sent: Tuesday, November 19, 2002 8:24 PM To: Multiple recipients of list ORACLE-L

I'm search of perfection in an imperfect world. This problem involves a V7.3.4.5 DB on V2.6 Solaris.

As part of our nightwork batch processing, a bunch of reports are run against the DB.
I have a DBMS_JOB which reports when processes are waiting for events like "db file sequential read". I typically get an email showing about 2 dozen sessions
with wait times of 3 - 15 seconds all of which are doing one block reads against
P_INVLOC; which is the Primary Key for the Inventory_Location table. This index
has INITRANS=31 & FREELISTS=31. This is a decent sized index at about 128MB.

I'm open for suggestion WRT what else can & could be done to eliminate or reduce these waits.

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Author:
  INET: Charlie_Mengler_at_HomeDepot.com

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Author: VIVEK_SHARMA
  INET: VIVEK_SHARMA_at_infosys.com

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To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Received on Wed Nov 20 2002 - 01:34:02 CST