Re: opening speed for nnml groups

[Steve Folkes <smf@rivers.dra.hmg.gb>]

Steinar Bang <sb@metis.no> writes:

>>> I haven't done any timing of it yet, but it seems like opening nnml
>>> groups get noticably slower, as the groups get bigger (with more
>>> ticked or read articles in them).

I've noticed this to.

>>> I was sort of idly wondering where the speed hit was?  Is it in the
>>> parsing of the .overview file?

It may be in the Unix filesystem itself.  I had a problem
with our newsfeed a few years ago that put about 10,000
files in one directory; it took over a week to remove them
all (using "rm -rf").

Some of the NNML groups that I use for mailing lists have
become quite large (over 1,000 messages) and have started to
slow down.  They are also slow when I use "ls" on the
directory that stores them though.

I started to look at changing the file naming code for the
NNML method so that it would attempt to spread files across
several directories, but I did not have the time to get
anywhere with it.

			- Steve.
-- 
Steve Folkes, N137, DERA Malvern, St Andrews Rd, Malvern, Worcs. WR14 3PS. UK.
   Tel: +44 1684 895649; Fax: +44 1684 894303; Email: smf@rivers.dra.hmg.gb