Re: [Exim] Is Exin SNMP Aware?

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著者: Philip Hazel
日付:  
To: Mike Meredith
CC: exim-users
題目: Re: [Exim] Is Exin SNMP Aware?
On Thu, 23 Aug 2001, Mike Meredith wrote:

> I don't think it would be impossible to generate some stats --- just
> update some counters when the log entry is generated. Updating a single
> counter file from multiple processes would be tricky, but not
> impossible.


That introduces interlocking between the multiple processes. A
bottleneck. It would impact on performance.

> It isn't really necessary as the stats can be pulled from the mail
> logs, but processing a 500,000 line log file can be a bit on the
> painful side.


Better to write yourself (or the world!) a long-running process that
tails the log and maintains the stats. It would only have to read the
whole log file at start-up. (Even then, if it had remembered where it
had got to, it could start at the end and do backwards skips.)

-- 
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.