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Dear all, I am working on a 64 bits Linux system. I issue the following R commands: > rm(list=ls()) # To remove all objects in the workspace. > gc() # To free memory. used (Mb) gc trigger (Mb) max used (Mb) Ncells 124250 6.7 350000 18.7 350000 18.7 Vcells 124547 1.0 786432 6.0 476934 3.7 > gc() # I had to do it again, don't know why! used (Mb) gc trigger (Mb) max used (Mb) Ncells

thanks for your help happy to say that the performance dramatically improved after i use the high performance settings from here http://wiki.dovecot.org/LoginProcess grep Login: /var/log/mail.log.1 |wc -l with the mail.log being of a typical, busy day. 412992 i also picked up the imap and pop3 connections during peak hours [root at ns1 domains]# doveadm who | awk '/imap/{m+=$2}/pop3/{n+=$2}END{print m,n}' username # proto (pids) (ips) max figures i got was 535 for imap and 97 for pop Question...

...> happy to say that the performance dramatically improved after i use the high performance settings from here > http://wiki.dovecot.org/LoginProcess > That's why that page is there. > grep Login: /var/log/mail.log.1 |wc -l > with the mail.log being of a typical, busy day. > 412992 > So about 5 login/s, not that busy, but that of course also depends on your HW and authentication backend. > i also picked up the imap and pop3 connections during peak hours > [root at ns1 domains]# doveadm who | awk '/imap/{m+=$2}/pop3/{n+=$2}END{print m,n}' > username...