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Home -> Community -> Mailing Lists -> Oracle-L -> v$tempstat question
I've been trying to track down the source of high 'direct path read' and 'direct path write' waits. It appears the waits are related to locally managed temporary tablespaces. However, I'm puzzled by what is reported in v$tempstat.
SQL> select FILE#, READTIM, WRITETIM, AVGIOTIM,
LSTIOTIM, MINIOTIM, MAXIORTM, MAXIOWTM from v$tempstat;
FILE# READTIM WRITETIM AVGIOTIM LSTIOTIM MINIOTIM
MAXIORTM MAXIOWTM
----- ------- -------- -------- -------- ----------
How could the values for MAXIORTM (maximum time spent doing a single read) be substatially greater than those reported for READTIM (time spent doing all reads)?
This situtation persists even after all of the users have logged out of the database, so it doesn't appear to be a case of the read having not yet completed.
FYI: We're running Oracle 8.1.6.3 on Sun Solaris.
-Ed
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