If you can re-run both programs, I'd check the
amount of:
undo
redo
redo synch writes.
and of course the v$session_event/wait,
and there's always the rows_processed
column from v$sql. All quick ways of
checking for symptoms, which may give
you a clue about cause.It is possible that a minor bug in the Pro*C could mean that each update was updating every single row in the table on every update (don't laugh, I've seen it before), whereas the PL/SQL, being easier to read and write, is coded correctly. Is it possible that the Pro*C uses an 'in-house library' for its updates that generates code to update every column in the table ? Whereas the PL/SQL is hand-coded to update only the changed columns Is the code doing single row commits inside a loop ? I wouldn't expect this to make a factor of 100 difference (correct my arithmetic if it's wrong), but PL/SQL cheats on commits in loops, and the saving can be significant. Jonathan Lewis http://www.jlcomp.demon.co.uk Next Seminar - UK, April 3rd - 5th http://www.jlcomp.demon.co.uk/seminar.html Host to The Co-Operative Oracle Users' FAQ http://www.jlcomp.demon.co.uk/faq/ind_faq.html Author of: Practical Oracle 8i: Building Efficient Databases -----Original Message----- To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> Date: 08 March 2002 11:21 |Oracle 8.0.5.0.0 |Tru64 4.0f | |We have a process running here and without going into the detail of it we |have a Pro C program that is taking ages to run updates and selects (2 |hours to do 10000 records). The program was changed to PL/SQL and we |suddenly were seeing 5 million records processed in 1 hour. | |Is PL/SQL that much faster than Pro C. Can somone more in the know give me |some hints ?? | |TIA | -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Jonathan Lewis INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (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).
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