RE: RAC CR REQUEST RETRY - Which node is holding the data block?
- From: Herring Dave - dherri <Dave.Herring@xxxxxxxxxx>
- To: "Christopher.Taylor2@xxxxxxxxxxxx" <Christopher.Taylor2@xxxxxxxxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 14 Nov 2012 17:03:30 +0000
Yes, that makes sense. I assume that question is in the context of historical
checking, so depending on cache size and activity the blocks may be already
flushed by the time you check. Ideally you could use
X$OBJECT_AFFINITY_STATISTICS and GV$GCSPFMASTER_INFO to check on stats at the
object-level in terms of where it's opened and any DRM activity, but like I
mentioned those are object-level, not block level like what you're interested
in.
DAVID HERRING
DBA
Acxiom Corporation
EML dave.herring@xxxxxxxxxx
TEL 630.944.4762
MBL 630.430.5988
1501 Opus Pl, Downers Grove, IL 60515, USA
WWW.ACXIOM.COM
-----Original Message-----
From: Christopher.Taylor2@xxxxxxxxxxxx
[mailto:Christopher.Taylor2@xxxxxxxxxxxx]
Sent: Wednesday, November 14, 2012 10:51 AM
To: Herring Dave - dherri; oracle-l@xxxxxxxxxxxxx
Subject: RE: RAC CR REQUEST RETRY - Which node is holding the data block?
Thanks!
I would assume this needs to be run during the interval when the block request
failures are occuring?
Chris
-----Original Message-----
From: Herring Dave - dherri [mailto:Dave.Herring@xxxxxxxxxx]
Sent: Wednesday, November 14, 2012 10:49 AM
To: Taylor Christopher - Nashville; oracle-l@xxxxxxxxxxxxx
Subject: RE: RAC CR REQUEST RETRY - Which node is holding the data block?
Chris,
I've got a query I pulled from a paper by Riyaj Shamsudeen on DRM that may be
of use:
SET NUMWIDTH 10
COL kjblname2 FORMAT A22
COL kjblowner HEADING 'Inst Owner|of Block'
COL kjblmaster HEADING 'Inst Master|of Block'
COL fl FORMAT 99999
COL blk FORMAT A10
SELECT kj.*, le.le_addr
FROM (SELECT kjblname, kjblname2, kjblowner, kjblmaster, kjbllockp
, SUBSTR(kjblname2, INSTR(kjblname2, ',') + 1,
INSTR(kjblname2, ',' , 1, 2) -
INSTR(kjblname2, ',', 1, 1) - 1) / 65536 fl
, SUBSTR(kjblname2, 1, INSTR(kjblname2, ',') - 1) blk
FROM x$kjbl) kj
, x$le le
WHERE le.le_kjbl = kj.kjbllockp
AND (fl = <file# for block> AND blk = <block# in question>) ORDER by
le.le_addr;
The instance master keeps track of a block's state whereas the instance owner
has the actual block in it's cache.
DAVID HERRING
DBA
Acxiom Corporation
EML dave.herring@xxxxxxxxxx
TEL 630.944.4762
MBL 630.430.5988
1501 Opus Pl, Downers Grove, IL 60515, USA WWW.ACXIOM.COM
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Christopher.Taylor2@xxxxxxxxxxxx
Sent: Tuesday, November 13, 2012 10:26 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: RAC CR REQUEST RETRY - Which node is holding the data block?
Setup:
10.2.0.4 64-bit
RHEL 3 node RAC
node1 is requesting blocks for a transaction - either node2 or node3 is holding
the block(s) that are being requested.
How can I determine which node(s) of the cluster are holding the requested
block(s)?
Regards,
Chris Taylor
Oracle DBA
Parallon IT&S
christopher.taylor2@xxxxxxxxxxxx<mailto:christopher.taylor2@xxxxxxxxxxxx>
www.parallon.net
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