On 30.12.2012 08:31, Daniel Farina wrote:
A version implementing that is attached, except I generate an
additional 64-bit session not exposed to the client to prevent even
casual de-leaking of the session state. That may seem absurd, until
someone writes a tool that de-xors things and relies on it and then
nobody feels inclined to break it. It also keeps the public session
number short.
I also opted to save the underestimate since I'm adding a handful of
fixed width fields to the file format anyway.
This patch needs documentation. At a minimum, the new calls_underest
field needs to be listed in the description of the pg_stat_statements.
Pardon for not following the discussion: What exactly does the
calls_underest field mean? I couldn't decipher it from the patch. What
can an admin do with the value? How does it compare with just bumping up
pg_stat_statements.max?
- Heikki
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