This link has been bookmarked by 23 people . It was first bookmarked on 05 Apr 2007, by Joel Liu.
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By default, you can store 15 different query profiles for your session. You can increase this up to 100 by setting the
profiling_history_sizesession variable.
Certain diagnostics rely on operating system support for thegetrusage()system call, so you may see NULL values for some statistics if you're on a platform that doesn't support this function.
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