The following bug has been logged online:

Bug reference: 1506
Logged by: Roberto
Email address: ralabiso (AT) hotmail (DOT) com
PostgreSQL version: 801
Operating system: Windows XP Professional
Description: too many postgres.exe processes on background
Details:

When I start up Postgre (installed as service during startup) y always have
4 postgres.exe processes on background.
Without having local or remotes connections (like external clients or
applications)after a few minutes i got more than 30 postgres.exe pocesses in
memory (run by admin 0% CPU and 60K of memory usage)

If i leave my pc on for hours instead of minutes, i got more than 200
postgres.exe bck processes

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TIP 5: Have you checked our extensive FAQ?

http://www.postgresql.org/docs/faq

This is normal. Postmaster, bgwriter, stats collector and stats
bufferer.

You are sure there are no connections at all?
If you connect to the server with psql and do a "select * from
pg_stat_activity", do they show up?
Do you get anything in the log, either in the pg_log directory or in the
eventlog?

//Magnus

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