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Here's a shallow but interesting article on Oracle performance tuning on GNU/Linux systems:
http://www.linuxjournal.com//article.php?sid=5840
postgres' nightly maintenance was emitting:
NOTICE: RegisterSharedInvalid: SI buffer overflow
NOTICE: InvalidateSharedInvalid: cache state reset
NOTICE: RegisterSharedInvalid: SI buffer overflow
NOTICE: InvalidateSharedInvalid: cache state reset
NOTICE: RegisterSharedInvalid: SI buffer overflow
NOTICE: InvalidateSharedInvalid: cache state reset
A note on one of the mailing lists indicates that this can happen if someone has an open transaction. In my case bouncing tomcat did the trick.
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TobyCabot - 21 Sep 2001 - 25 Feb 2002
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