One minor caveat about setting timed_os_statistics. On Solaris, if you set
timed_os_statistics to non-zero, microstate accounting at the OS level is
enabled for the server process. Common practice is to leave it off for
performance reason. But I've never seen experimental data proving the negative
effect of turning it on.

Yong Huang

Tanel Poder wrote:

Hi! Statistics level ALL means TYPICAL + row source execution stats +
timed_os_statistics. If you want to switch to ALL for performance reasons, you
can switch only row source stats on with parameter setting
_rowsource_execution_statistics to true (on session level). But I doubt it'll
help in current case anyway.

Tanel

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