Database Tuning (MOSC)

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one sid process has over 20 sql_id associated with it and it is very slow

edited Nov 26, 2013 9:55PM in Database Tuning (MOSC) 16 commentsAnswered
 OS: HPDB: 11.1.0.7

we have an insert process sid: 639, it basically insert to a transaction table. and people complain the transactions piled up due to slowness.

I literally watched it by my eyes on toad and found out there are over around 20 sql_id associated with it.

and it has select then insert contantly. all explain plan seems ok.

How do I tune it from here?

Thanks in advance.

P.S. the wait event for all those sql_id are 'db file sequential read'.  

SGA size is 9g, and pga size is 4g. This company dont believe in increase memory . So I would like to see what I can do to tune it.

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