overview index cache

[Katsuhiro Kondou]

In article <20001031072944X.kondou at inn.do.mms.mt.nec.co.jp>,
	Katsuhiro Kondou <kondou at nec.co.jp> wrote;

} I mean buffindexed).  I'm thinking of having overivew index
} cache to reduce this, but some methods may not care those
} behavior.  All methods may not need.  To match both I'll add
} new feature into OVctl() which will do something like madvise(),
} to inform method to keep or free cache for index.  For method
} which does not care, just returns with doing nothing.  Any

Just done this work and committed.  This should improve,
for buffindexed, article retrieval time and reduces CPU
usage when issuing NEXT for groups that have big gap in
article number.
-- 
Katsuhiro Kondou