On Mon, 6 Oct 2003, DOLIST Technical Center wrote: > I'm experiencing a strange processing since some months concerning > the using of the XMail's cache. I'm not saying this is bad or not, I > just want to understand why it works this way. I've already began a > thread there without any result so I make some tests by myself during > this summer. > > During 4 weeks I setup Xmail normally and let the cache working by > itself. Mails was sent but after one week performances "seems" to be > lower. Never we have the MRTG Traffic Analysis bandwidth monitoring up > to 100% when we have usually on big posts and it was always > decreasing. I just reboot the system. > > Next 4 weeks I suppress the cache manually when I think that it was > "too slow". Surprising, just after deletion the bandwidth was up next > to 100% for some hours, then, decreasing slowly day after 1 or 2 days. > > The next 4 weeks, I set up a cron that do: > > del D:\MailRoot\xmail\MailRoot\dnscache\mx\*.* /S/Q > nul > > every 1 hours, starting at 23h55 (just before an hour without minutes, > just because our customers always set up campaign planning on rounded > hours) and ALL of them goes very quickly to 100% bandwidth. > > The second thing I noticed was the noise on this bandwidth that was > reduced to almost 0% between 2 posts, when it was alway between 5-10% > after one or 2 days when I don't purge the cache. > > We use "SmartDNSHost" > "192.168.41.2:udp,192.168.41.2:tcp,192.168.41.1:udp,192.168.41.1:tcp" > on a local network. > > What could it be? Any idea? Does XMail lost time searching in cache > folders or it has all in memory?
It should be exactly the contrary. XMail won't make any new DNS resolution if it'll find an MX record for a domain whose TTL is still valid. How many files did you have inside the cache ? Maybe it is a sub-optimal performance of NTFS with lots of small files. - Davide - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
