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Wednesday, February 22, 2006. Is a client wait event. It is the wait event your clients wait on when they say "commit". It is the wait for LGWR to actually write their redo to disk and return back to them. You can "tune" this by making lgwr faster (no raid 5 for example) and committing less frequently and generating less redo (BULK operations generate less redo than row by row do). LGWR wait for redo copy:. Posted by James Pei @ 3:34 PM. Sunday, February 19, 2006. Oracle: v$bh - who is using buffer cache?

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Wednesday, February 22, 2006. Is a client wait event. It is the wait event your clients wait on when they say commit. It is the wait for LGWR to actually write their redo to disk and return back to them. You can tune this by making lgwr faster (no raid 5 for example) and committing less frequently and generating less redo (BULK operations generate less redo than row by row do). LGWR wait for redo copy:. Posted by James Pei @ 3:34 PM. Sunday, February 19, 2006. Oracle: v$bh - who is using buffer cache?

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James's Blog | jamespei.blogspot.com Reviews

https://jamespei.blogspot.com

Wednesday, February 22, 2006. Is a client wait event. It is the wait event your clients wait on when they say "commit". It is the wait for LGWR to actually write their redo to disk and return back to them. You can "tune" this by making lgwr faster (no raid 5 for example) and committing less frequently and generating less redo (BULK operations generate less redo than row by row do). LGWR wait for redo copy:. Posted by James Pei @ 3:34 PM. Sunday, February 19, 2006. Oracle: v$bh - who is using buffer cache?

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jamespei.blogspot.com

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James's Blog: February 2006

http://jamespei.blogspot.com/2006_02_01_archive.html

Wednesday, February 22, 2006. Is a client wait event. It is the wait event your clients wait on when they say "commit". It is the wait for LGWR to actually write their redo to disk and return back to them. You can "tune" this by making lgwr faster (no raid 5 for example) and committing less frequently and generating less redo (BULK operations generate less redo than row by row do). LGWR wait for redo copy:. Posted by James Pei @ 3:34 PM. Sunday, February 19, 2006. Oracle: v$bh - who is using buffer cache?

2

James's Blog: Oracle: DBMS_SYSTEM Package

http://jamespei.blogspot.com/2006/02/oracle-dbmssystem-package.html

Tuesday, February 14, 2006. Oracle: DBMS SYSTEM Package. Exec dbms system.ksdwrt(n, message);. N" indicates the destination. 1 - write to trace file. 2 - write to alert log. 3 - write to both. 2) set sql trace in session. Exec dbms system.set sql trace in session(sid, serial#, true);. Exec dbms system.set ev(sid,serial#, event, level, name);. Exec dbms system.set ev(31, 97, 10046, 4, ' );. 1 - standard sql trace functionality. 4 - as level 1 plus tracing of bind variables. 8 - as level 1 plus wait events.

3

James's Blog: Oracle: Bulk Collect

http://jamespei.blogspot.com/2006/02/oracle-bulk-collect.html

Wednesday, February 15, 2006. TYPE EmpCurTyp IS REF CURSOR;. TYPE NumList IS TABLE OF NUMBER;. TYPE NameList IS TABLE OF VARCHAR2(15);. Emp cv EmpCurTyp;. OPEN emp cv FOR 'SELECT empno, ename FROM emp';. FETCH emp cv BULK COLLECT INTO empnos, enames;. CLOSE emp cv;. EXECUTE IMMEDIATE 'SELECT sal FROM emp'. BULK COLLECT INTO sals;. Only insert/update/delete can have output bind variables. To bulk-bind them, use BULK RETURNING INTO clause in an EXECUTE IMMEDIATE. TYPE NameList IS TABLE OF VARCHAR2(15);.

4

James's Blog: Java: GC tunning

http://jamespei.blogspot.com/2006/02/java-gc-tunning.html

Thursday, February 09, 2006. Http:/ www.petefreitag.com/articles/gctuning/. 32 The Young Generation. The bigger the young generation the less minor GC's, but this implies a smaller tenured generation which increases the frequency of major collections. You need to look at your application and determine how long your objects live for to tune this. XX:NewRatio=3 - the young generation will occupy 1/4 the overall heap. 4 Types of Collectors. Tenured collector is the same as in default. Good for client apps (...

5

James's Blog: October 2005

http://jamespei.blogspot.com/2005_10_01_archive.html

Monday, October 31, 2005. Evaluation of expressions and conditions. Choice of optimizer approaches. Choice of access paths. Choice of join orders. Choice of join methods. Posted by James Pei @ 6:16 PM. Oracle Hash Join and nested join. In a nested loop join, the database reads and index, builds a list of ROW ID’s and then probes into the second table for the matching rows. The propensity of the SQL optimizer to invoke a hash join is heavily controlled by the setting for the hash area size. The Optimizer ...

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Wednesday, February 22, 2006. Is a client wait event. It is the wait event your clients wait on when they say "commit". It is the wait for LGWR to actually write their redo to disk and return back to them. You can "tune" this by making lgwr faster (no raid 5 for example) and committing less frequently and generating less redo (BULK operations generate less redo than row by row do). LGWR wait for redo copy:. Posted by James Pei @ 3:34 PM. Sunday, February 19, 2006. Oracle: v$bh - who is using buffer cache?

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