Hello,

For troubleshooting reasons I like to find the link between a system
process id, the corresponding SQL statement, the user executing it and
the system impact of the query (ioread,iowrites,...)
If I understand the documentation well: the sessions and
commandstatistics system tables can provide me this information.
However the sessions table is not in my system en the commandstatistics
table is always empty.
I tried with different users logged in (normal user, dba,sysdba). 
In the dbmgui I get results when using the sessions button (does that
come from the sessions table?).

DB: 7.5.00.14
OS: Suse 9.1

Second question: how long is information stored in these tables? Since
instance startup? I like to get an overview of all executed query during
one day of users testing an application.

Regards,

Filip

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