One of my developers is testing a process that reads a CLOB, modifies it,
and inserts it to another table.  The reading and modifying goes very
quickly, but the inserts take a long time.  Looking at the main Wait Events
I'm seeing a lot of direct path read (lob) and direct path write (lob) which
seems to imply that a lot of the delay is i/o related.
 
Does anyone have any suggestions to speed up the inserts?  The developer has
been playing around with chunk size but without any improvement.
 
Oracle 8.1.7.2
Solaris 2.6
 
Here are the main wait events from statspack.  The SQL*Net message from
dblink is from a different process that was running at the same time:
 
SQL*Net message from dblink       381,218          0           0     0
689.4
SQL*Net message to dblink         381,216          0           0     0
689.4
db file scattered read             11,034          0           0     0
20.0
direct path read (lob)              1,233          0           0     0
2.2
log file parallel write               696          0           0     0
1.3
direct path write (lob)               548          0           0     0
1.0
db file sequential read               217          0           0     0
0.4
db file parallel write                170          0           0     0
0.3
control file parallel write           161          0           0     0
0.3
 
 
Thanks,
Jay Miller
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Author: Miller, Jay
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