On Dec 31, 2014, at 1:23 PM, Wojciech Puchar <[email protected]> wrote: > > i use dovecot 2 under FreeBSD (dovecot2-2.2.15 compiled from ports). > > tried both with kqueue enabled or not. > > everything works very fast, EXCEPT fetching big mail. > > tried multiple clients (thunderbird on windows, alpine on the same server, > alpine on other unix server connected by 1Gb/s LAN) and fetching peaks at > 1MB/s. NO SSL! > > could you please point me where to search for a problem. > > hints: > > writing over IMAP (eg. writing to Sent folder) works at full speed. > > Doesn't seem like a problem with unix server, every other service goes at > speed 70-100MB/s both directions (like samba, ftp). > > tried to turn off "kqueue" compile time option, no difference. > > Please give me a hint at least what to check. Does dovecot use other way to > sent data over TCP socket than other programs?
Beat metal or VM? Which NIC driver? IPv4 or IPv6? Is the mail spool on the local server or on a SAN like NFS or ISCSI? How slow is "slow" ? How big is "big" ? Does it stall? Does it start of fast and slow down? -Robert
