Gordon Messmer wrote: > On 06/09/2009 01:51 PM, Alexander M Thompson wrote: > >> The only problem is, it seems like Copy operations are very slow for the >> first 30-45 seconds of a given imap session, sometimes to the point >> where you only can do one operation before it gets better (i.e. copying >> a small mail to the sent folder takes 30 seconds). >> > ... > > You do realize that copying a message to the sent folder will cause > thunderbird to initiate a new connection, right? If the first copy > operation has a long delay and subsequent copy operations do not, then > you're probably seeing general connection delays. Check TCPDOPTS in > imapd, and add "-nodnslookup -noidentlookup" if they're not present. > I'd checked all that previously, the connection completes successfully and starts issuing imap commands before pausing. I've gone so far as to truss the imapd process on a test server while one of the people experiencing the problem used it. What I found is disheartening to say the least:
PID TIMESTAMP SYSCALL = RETURN CODE 26243: 173.5222 openat(-3041965, "./.Sent/cur", O_RDONLY|O_NDELAY|O_LARGEFILE) = 7 26243: 173.5223 fcntl(7, F_SETFD, 0x00000001) = 0 26243: 173.5223 fstat64(7, 0x08042420) = 0 26243: 173.8125 getdents64(7, 0xFEF64000, 8192) = 7824 26243: 173.9659 getdents64(7, 0xFEF64000, 8192) = 7776 26243: 174.0832 getdents64(7, 0xFEF64000, 8192) = 7776 .... (Lots and lots of getdents64 [get directory entries] calls, enumerating every file in ./.Sent/cur) 26243: 214.3709 getdents64(7, 0xFEF64000, 8192) = 7792 26243: 214.3973 getdents64(7, 0xFEF64000, 8192) = 480 26243: 214.3975 getdents64(7, 0xFEF64000, 8192) = 0 For whatever reason, courier is enumerating every single file in .Sent/cur and doing *something*, an operation that takes about 41 seconds in this case. Again, this only happens once per connection or so, so it must be putting it all into a hash table for future use... or something. But it's doing this before telling the client it has completed the copy operation (which it has, I can tell from the truss output). I'm truly at a loss as to how I could fix this behavior. ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ courier-users mailing list courier-users@lists.sourceforge.net Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
