Creation Zone

  • Subscribe to our RSS feed.
  • Twitter
  • StumbleUpon
  • Reddit
  • Facebook
  • Digg

Tuesday, 30 July 2013

Oracle Tips : Solaris lgroups, CT optimization, Data Pump, Recompilation of Objects, ..

Posted on 02:09 by Unknown
1. [Re]compiling all objects in a schema


exec DBMS_UTILITY.compile_schema(schema => 'SCHEMA');

To recompile only the invalid objects in parallel:


exec UTL_RECOMP.recomp_parallel(<NUM_PARALLEL_THREADS>, 'SCHEMA');

A NULL value for SCHEMA recompiles all invalid objects in the database.


2. SGA breakdown in Solaris Locality Groups (lgroup)

To find the breakdown, execute pmap -L | grep shm. Then separate the lines that are related to each locality group and sum up the value in 2nd column to arrive at a number that shows the total SGA memory allocated in that locality group.

(I'm pretty sure there will be a much easier way that I am not currently aware of.)


3. Default values for shared pool, java pool, large pool, ..

If the *pool parameters were not set explicitly, executing the following query is one way to find out what are they currently set to.

eg.,

SQL> select * from v$sgainfo;

NAME BYTES RES
-------------------------------- ---------- ---
Fixed SGA Size 2171296 No
Redo Buffers 373620736 No
Buffer Cache Size 8.2410E+10 Yes
Shared Pool Size 1.7180E+10 Yes
Large Pool Size 536870912 Yes
Java Pool Size 1879048192 Yes
Streams Pool Size 268435456 Yes
Shared IO Pool Size 0 Yes
Granule Size 268435456 No
Maximum SGA Size 1.0265E+11 No
Startup overhead in Shared Pool 2717729536 No
Free SGA Memory Available 0

12 rows selected.

4. Fix to PLS-00201: identifier 'GV$SESSION' must be declared error

Grant select privilege on gv_$SESSION to the owner of the database object that failed to compile.

eg.,

SQL> alter package OWF_MGR.FND_SVC_COMPONENT compile body;
Warning: Package Body altered with compilation errors.

SQL> show errors
Errors for PACKAGE BODY OWF_MGR.FND_SVC_COMPONENT:

LINE/COL ERROR
-------- -----------------------------------------------------------------
390/22 PL/SQL: Item ignored
390/22 PLS-00201: identifier 'GV$SESSION' must be declared

SQL> grant select on gv_$SESSION to OWF_MGR;
Grant succeeded.

SQL> alter package OWF_MGR.FND_SVC_COMPONENT compile body;
Package body altered.

5. Solaris Critical Thread (CT) optimization for Oracle logwriter (lgrw)

Critical Thread is a new scheduler optimization available in Oracle Solaris releases Solaris 10 Update 10 and later versions. Latency sensitive single threaded components of software such as Oracle database's logwriter benefit from CT optimization.

On a high level, LWPs marked as critical will be granted more exclusive access to the hardware. For example, on SPARC T4 and T5 systems, such a thread will be assigned exclusive access to a core as much as possible. CT optimization won't delay scheduling of any runnable thread in the system.

Critical Thread optimization is enabled by default. However the users of the system have to hint the OS by marking a thread or two "critical" explicitly as shown below.


priocntl -s -c FX -m 60 -p 60 -i pid <pid_of_critical_single_threaded_process>

From database point of view, logwriter (lgwr) is one such process that can benefit from CT optimization on Solaris platform. Oracle DBA's can either make the lgwr process 'critical' once the database is up and running, or can simply patch the 11.2.0.3 database software by installing RDBMS patch 12951619 to let the database take care of it automatically. I believe Oracle 12c does it by default. Future releases of 11g software may make lgwr critical out of the box.

Those who install the database patch 12951619 need to carefully follow the post installation steps documented in the patch README to avoid running into unwanted surprises.


6. ORA-14519 error while importing a table from a Data Pump export dump

ORA-14519: Conflicting tablespace blocksizes for table : Tablespace XXX block size 32768 [partition specification] conflicts with previously specified/implied tablespace YYY block size 8192
[object-level default]
Failing sql is:
CREATE TABLE XYZ
..

All partitions in table XYZ are using 32K blocks whereas the implicit default partition is pointing to a 8K block tablespace. Workaround is to use the REMAP_TABLESPACE option in Data Pump impdp command line to remap the implicit default tablespace of the partitioned table to the tablespace where the rest of partitions are residing.


7. Index building task in Data Pump import process

When Data Pump import process is running, by default, index building is performed with just one thread, which becomes a bottleneck and causes the data import process to take a long time especially if many large tables with millions of rows are being imported into the target database. One way to speed up the import process execution is by skipping index building as part of data import task with the help of EXCLUDE=INDEX impdp command line option. Extract the index definitions for all the skipped indexes from the Data Pump dump file as shown below.


impdp <userid>/<password> directory=<directory> dumpfile=<dump_file>.dmp sqlfile=<index_def_file>.sql INCLUDE=INDEX

Edit <index_def_file>.sql to set the desired number of parallel threads to build each index. And finally execute the <index_def_file>.sql to build the indexes once the data import task is complete.

Email ThisBlogThis!Share to XShare to Facebook
Posted in oracle database solaris | No comments
Newer Post Older Post Home

0 comments:

Post a Comment

Subscribe to: Post Comments (Atom)

Popular Posts

  • *nix: Workaround to cannot find zipfile directory in one of file.zip or file.zip.zip ..
    Symptom: You are trying to extract the archived files off of a huge (any file with size > 2 GB or 4GB, depending on the OS) ZIP file with...
  • C/C++: Printing Stack Trace with printstack() on Solaris
    libc on Solaris 9 and later, provides a useful function called printstack , to print a symbolic stack trace to the specified file descripto...
  • JDS: Installing Sun Java Desktop System 2.0
    This document will guide you through the process of installing JDS 2.0 on a PC from integrated CDROM images Requirements I...
  • Binary compatibility
    What's It? "Binary compatibility" (BC) is the ability of one machine to run software that was written for another without hav...
  • Solaris: NULL pointer bugs & /usr/lib/0@0.so.1 library
    Some programmers assume that a NULL character pointer is the same as a pointer to a NULL string. However de-referencing a NULL pointer (ie.,...
  • Database: Oracle Server Architecture (overview)
    Oracle server consists of the following core components: 1) database(s) & 2) instance(s) 1) database consists of: 1) datafil...
  • Sun: OpenJDK
    Open source JDK, that is. Sun Microsystems did it again -- As promised during JavaOne event back in May 2006, Sun made the implementation of...
  • Consolidating Siebel CRM 8.0 on a Single Sun SPARC Enterprise Server, T5440
    .. blueprint document is now available on wikis.sun.com . Here is the direct link to the blueprint:              Consolidating Oracle Siebel...
  • Oracle Internet Directory 11g Benchmark on SPARC T5
    SUMMARY System Under Test (SUT)     Oracle's SPARC T5-2 server Software     Oracle Internet Directory 11 g R1-PS6 Target Load     50...
  • Fix to Firefox 3 Crash on Solaris 10 x86
    Symptom : Firefox 3 crashes on Solaris 10 x86 when the web browser tries to render some of the HTML pages with SWF content in them. For exam...

Categories

  • 80s music playlist
  • bandwidth iperf network solaris
  • best
  • black friday
  • breakdown database groups locality oracle pmap sga solaris
  • buy
  • deal
  • ebiz ebs hrms oracle payroll
  • emca oracle rdbms database ORA-01034
  • friday
  • Garmin
  • generic+discussion software installer
  • GPS
  • how-to solaris mmap
  • impdp ora-01089 oracle rdbms solaris tips upgrade workarounds zombie
  • Magellan
  • music
  • Navigation
  • OATS Oracle
  • Oracle Business+Intelligence Analytics Solaris SPARC T4
  • oracle database flashback FDA
  • Oracle Database RDBMS Redo Flash+Storage
  • oracle database solaris
  • oracle database solaris resource manager virtualization consolidation
  • Oracle EBS E-Business+Suite SPARC SuperCluster Optimized+Solution
  • Oracle EBS E-Business+Suite Workaround Tip
  • oracle lob bfile blob securefile rdbms database tips performance clob
  • oracle obiee analytics presentation+services
  • Oracle OID LDAP ADS
  • Oracle OID LDAP SPARC T5 T5-2 Benchmark
  • oracle pls-00201 dbms_system
  • oracle siebel CRM SCBroker load+balancing
  • Oracle Siebel Sun SPARC T4 Benchmark
  • Oracle Siebel Sun SPARC T5 Benchmark T5-2
  • Oracle Solaris
  • Oracle Solaris Database RDBMS Redo Flash F40 AWR
  • oracle solaris rpc statd RPC troubleshooting
  • oracle solaris svm solaris+volume+manager
  • Oracle Solaris Tips
  • oracle+solaris
  • RDC
  • sale
  • Smartphone Samsung Galaxy S2 Phone+Shutter Tip Android ICS
  • solaris oracle database fmw weblogic java dfw
  • SuperCluster Oracle Database RDBMS RAC Solaris Zones
  • tee
  • thanksgiving sale
  • tips
  • TomTom
  • windows

Blog Archive

  • ▼  2013 (16)
    • ►  December (3)
    • ►  November (2)
    • ►  October (1)
    • ►  September (1)
    • ►  August (1)
    • ▼  July (1)
      • Oracle Tips : Solaris lgroups, CT optimization, Da...
    • ►  June (1)
    • ►  May (1)
    • ►  April (1)
    • ►  March (1)
    • ►  February (2)
    • ►  January (1)
  • ►  2012 (14)
    • ►  December (1)
    • ►  November (1)
    • ►  October (1)
    • ►  September (1)
    • ►  August (1)
    • ►  July (1)
    • ►  June (2)
    • ►  May (1)
    • ►  April (1)
    • ►  March (1)
    • ►  February (1)
    • ►  January (2)
  • ►  2011 (15)
    • ►  December (2)
    • ►  November (1)
    • ►  October (2)
    • ►  September (1)
    • ►  August (2)
    • ►  July (1)
    • ►  May (2)
    • ►  April (1)
    • ►  March (1)
    • ►  February (1)
    • ►  January (1)
  • ►  2010 (19)
    • ►  December (3)
    • ►  November (1)
    • ►  October (2)
    • ►  September (1)
    • ►  August (1)
    • ►  July (1)
    • ►  June (1)
    • ►  May (5)
    • ►  April (1)
    • ►  March (1)
    • ►  February (1)
    • ►  January (1)
  • ►  2009 (25)
    • ►  December (1)
    • ►  November (2)
    • ►  October (1)
    • ►  September (1)
    • ►  August (2)
    • ►  July (2)
    • ►  June (1)
    • ►  May (2)
    • ►  April (3)
    • ►  March (1)
    • ►  February (5)
    • ►  January (4)
  • ►  2008 (34)
    • ►  December (2)
    • ►  November (2)
    • ►  October (2)
    • ►  September (1)
    • ►  August (4)
    • ►  July (2)
    • ►  June (3)
    • ►  May (3)
    • ►  April (2)
    • ►  March (5)
    • ►  February (4)
    • ►  January (4)
  • ►  2007 (33)
    • ►  December (2)
    • ►  November (4)
    • ►  October (2)
    • ►  September (5)
    • ►  August (3)
    • ►  June (2)
    • ►  May (3)
    • ►  April (5)
    • ►  March (3)
    • ►  February (1)
    • ►  January (3)
  • ►  2006 (40)
    • ►  December (2)
    • ►  November (6)
    • ►  October (2)
    • ►  September (2)
    • ►  August (1)
    • ►  July (2)
    • ►  June (2)
    • ►  May (4)
    • ►  April (5)
    • ►  March (5)
    • ►  February (3)
    • ►  January (6)
  • ►  2005 (72)
    • ►  December (5)
    • ►  November (2)
    • ►  October (6)
    • ►  September (5)
    • ►  August (5)
    • ►  July (10)
    • ►  June (8)
    • ►  May (9)
    • ►  April (6)
    • ►  March (6)
    • ►  February (5)
    • ►  January (5)
  • ►  2004 (36)
    • ►  December (1)
    • ►  November (5)
    • ►  October (12)
    • ►  September (18)
Powered by Blogger.

About Me

Unknown
View my complete profile