Refreshing mview is hanging after a database level gather stats
hi guys,
can you please help me identify the root cause of this issue.
the scenario is this:
1. we have a scheduled unix job that will refresh an mview everyday, from tuesday to saturdays.
2. database maintenance being done during weekends (sundays), gathering stats at a database level.
3. the refresh mview unix job apparently is hanging every tuesdays.
4. our workaround is to kill the job, request for a schema gather stats, then re-run the job. and voila, refresh mview will be successful then.
5. and the rest of the weekdays until saturdays, refresh mview is having no problems.
we already identified during testing that the scenario where the refresh mview is failing is when after we are gathering stats in a database level.
during gather stats in a schema level, refresh mview is successful.
can you please help me understand why we are failing refreshing mview after we gather stats in the database level??
we are using oracle 9i
the creation of the mview goes something like below:
create materialized view hanging_mview
build deferred
refresh on demand
query rewrite disabled
appreciate all your help.
thanks a lot in advance.
1. we have a scheduled unix job that will refresh an mview everyday, from tuesday to saturdays.
2. database maintenance being done during weekends (sundays), gathering stats at a database level.
3. the refresh mview unix job apparently is hanging every tuesdays.
4. our workaround is to kill the job, request for a schema gather stats, then re-run the job. and voila, refresh mview will be successful then.
5. and the rest of the weekdays until saturdays, refresh mview is having no problems.
You know Tuesday's MV refresh "hangs".
You don't know why it does not complete.
You desire solution so that it does complete.
You don't really know what is is doing on Tuesdays, but hope automagical solution will be offered here.
The ONLY way I know how to possibly get some clues is SQL_TRACE.
Only after knowing where time is being spent will you have a chance to take corrective action.
The ball is in your court.
Enjoy your mystery!
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Snapshot Set DB Name DB Id Instance Inst num Release Cluster Host Std Block Size
First (1st) DMFEPRD 3155815743 dmfeprd 1 11.2.0.1.0 NO uscndb18 8192
Second (2nd) DMFEPRD 3155815743 dmfeprd 1 11.2.0.1.0 NO uscndb18 8192
Snapshot Set Begin Snap Id Begin Snap Time End Snap Id End Snap Time Avg Active Users Elapsed Time (min) DB time (min)
1st 2700 25-Jun-11 12:17:51 (Sat) 2701 25-Jun-11 12:23:40 (Sat) 2.69 5.82 15.65
2nd 2702 25-Jun-11 12:47:17 (Sat) 2703 25-Jun-11 12:52:52 (Sat) 2.40 5.58 13.39
%Diff -10.78 -4.12 -14.44
Host Configuration Comparison
1st 2nd Diff %Diff
Number of CPUs: 32 32 0 0.0
Number of CPU Cores: 4 4 0 0.0
Number of CPU Sockets: 1 1 0 0.0
Physical Memory: 65408M 65408M 0M 0.0
Load at Start Snapshot: 6.14 2.03 -4.12 -66.9
Load at End Snapshot: 6.95 4.67 -2.28 -32.8
%User Time: 13.43 13.04 -.38 -2.9
%System Time: 6.95 1.26 -5.69 -81.9
%Idle Time: 79.62 85.7 6.07 7.6
%IO Wait Time: 0 0 0 0.0
Cache Sizes
1st (M) 2nd (M) Diff (M) %Diff
Memory Target 10,240.0 10,240.0 0.0 0.0
.....SGA Target 6,656.0 6,656.0 0.0 0.0
..........Buffer Cache 672.0 672.0 0.0 0.0
..........Shared Pool 1,472.0 1,472.0 0.0 0.0
..........Large Pool 64.0 64.0 0.0 0.0
..........Java Pool 224.0 224.0 0.0 0.0
..........Streams Pool 64.0 64.0 0.0 0.0
.....PGA Target 3,584.0 3,584.0 0.0 0.0
Log Buffer 18.6 18.6 0.0 0.0
Load Profile
1st per sec 2nd per sec %Diff 1st per txn 2nd per txn %Diff
DB time: 2.69 2.40 -10.78 0.96 0.14 -85.42
CPU time: 0.90 2.13 136.67 0.32 0.12 -62.50
Redo size: 28,238.40 149,564.99 429.65 10,057.71 8,577.01 -14.72
Logical reads: 8,840.64 21,941.38 148.19 3,148.78 1,258.26 -60.04
Block changes: 176.06 1,032.02 486.18 62.71 59.18 -5.63
Physical reads: 1.82 37.36 1,952.75 0.65 2.14 229.23
Physical writes: 6.69 25.16 276.08 2.38 1.44 -39.50
User calls: 118.44 318.49 168.90 42.19 18.26 -56.72
Parses: 91.31 492.38 439.24 32.52 28.24 -13.16
Hard parses: 4.73 31.89 574.21 1.68 1.83 8.93
W/A MB processed: 908,952.26 4,708,929.40 418.06 323,742.82 270,039.92 418.06
Logons: 18.65 41.19 120.86 6.64 2.36 -64.46
Executes: 109.63 584.01 432.71 39.05 33.49 -14.24
Transactions: 2.81 17.44 520.64
1st 2nd Diff
% Blocks changed per Read: 1.99 4.70 2.71
Recursive Call %: 84.16 92.70 8.53
Rollback per transaction %: 0.00 0.00 0.00
Rows per Sort: 1,620.17 1,194.14 -426.02
Avg DB time per Call (sec): 0.02 0.01 -0.02 -
Oracle 11g R1 Installation hangs at Cloning Database .
When I installing Oracle 11g R1 on RHEL 5.4, the installation hangs in Cloning Database step. I have stopped the installation and then executed the scripts mentioned during installation :
"Run below as root user
/opt1/Oracle/OracleDB/oraInventory/orainstRoot.sh
/opt1/Oracle/OracleDB/product/11.1.0/db_2/root.sh
After I run the sqlplus and tried to logon:
SJP2VM0140:work2}-/home/work2# sqlplus
SQL*Plus: Release 11.1.0.6.0 - Production on Wed Jul 21 20:17:31 2010
Copyright (c) 1982, 2007, Oracle. All rights reserved.
Enter user-name: scott
Enter password:
ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux-x86_64 Error: 2: No such file or directory
Process ID: 0
Session ID: 0 Serial number: 0
Any help in this regard is greatly appreciated.
Edited by: Durga Pulipati on Jul 22, 2010 12:13 AM# sqlplus /nolog
SQL> connect / as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 1269366784 bytes
Fixed Size 2144024 bytes
Variable Size 738199784 bytes
Database Buffers 520093696 bytes
Redo Buffers 8929280 bytes
ORA-00205: error in identifying control file, check alert log for more info
The alert log :
<txt>ORA-00210: cannot open the specified control file
ORA-00202: control file: '/opt1/Oracle/OracleDB/oradata/orcl/control03.ctl'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/opt1/Oracle/OracleDB/oradata/orcl/control02.ctl'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/opt1/Oracle/OracleDB/oradata/orcl/control01.ctl'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Could you please help me with this? -
Forms gets hang after 15 mins in 11.5.10.2
Hi,
I have cloned an instance from production. Now my forms in production are getting hanged after 15 mins but the development instance is running fine. The EBS version is 11.5.10.2. Linux RedHat 4.0. Jserv 1.1.
Everytime this is happening at 15-20 mins interval. I have seen the log files in iAS_HOME/Apache but they are clean.
Can anyone plz help on this.
Thanks.
Neeraj.Rapid Clone does not modify the source system. adpreclone.pl prepares the source system to be cloned by collecting information about the database and creating generic templates of files containing source specific hardcoded values.
I suggest you use Forms Runtime Diagnostics (FRD) to debug the issue, for more details on how to use it please check Note: 150168.1 - Obtaining Forms Runtime Diagnostics (FRD) In Oracle Applications 11i
https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=150168.1
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