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FreeBSD General Other questions regarding FreeBSD which do not fit in any of the categories below. |
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More tcp connections
Hey all,
So I have a FreeBSD qmail server with courier IMAP and pop3 also, along with the obligatory Spam assassin. We have about ~110 users. I moved everyone from Outlook/Outlook Express with POP3, to Thunderbird with IMAP. We are getting timeouts occasionally when people are sending mail, and it is just in gerenal slow. It is in a VM with 2 GB of ram and a 2.5ghz processor, so it should be fast enough. I think that the problem lies with too many connections because when it was POP3, everything was fine and happy. How do I allow more (tcp?) connections? I am thinking a sysctl variable, but I don't have access to this server and it will probably be awhile before I do, but I want to be prepped when I go there. Thanks! -=Tom Last edited by tad1214; 1st June 2008 at 03:32 PM. |
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Not to sidestep your question, but what type of VM does FBSD live in?
The reason I ask is the default network driver for < FBSD 7 is slow. If this applies to you, read here: http://ivoras.sharanet.org/freebsd/vmware.html If not, ignore this post. (Note that it helps to give more info, such as FBSD version and VM type.)
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Just letting off some steam, running a production environment inside of a emulation/virtualizer is such a bad idea, performance is never as good as a dedicated beige box.
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The VMWare em vs lnc very well could be it. I will keep that in mind. As for running in a VM, we have a $0 budget :-\ So adding servers isn't an option. We got a fairly mean server on a "buddy" deal from the owner, traded his friend stuff for it, (Dual Quad Cores with 4GB of ram and 8 250GB sata drives) for a fairly low tech place (A greenhouse) so virtualization made the most sense. Everything has run extremely happy, even the mail server until recent, in the VM's. When I show a top, everything looks fairly happy, but we are still getting timeouts. The lnc vs em seems to be likely cause here though. Thanks!
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Info,
FreeBSD 6 -stable Vmware server 1.05 Running on CentOS 5.1 |
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Quote:
And as to whether or not it's a good idea: it was a departmental decision in my case. It has been working out well so far.
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Hey, I do have 2 questions. Whenever I would compile the kernel with SMP and give it 2 processors it would hard lock at random. Any experience with this? Also, what kind of an increase is the em vs. lnc, pretty substantial for a network heavy box?
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