Re: tcpserver unable to fork?
On Wed, May 17, 2000 at 06:57:50PM +0200, Peter van Dijk spoke thusly: > No. EAGAIN means for some _temporary_ reason it cannot fork. Maybe you have > reached your max processes limit, globally or per user. I su'd to qmaild and ran ulimit, it says unlimited. Globally the machine only has 80 processes, any other ideas? Timbo.
Re: tcpserver unable to fork?
On Wed, May 17, 2000 at 05:47:42PM +0100, Tim Gollschewsky wrote: > Detectives, > > smtpd (running from tcpserver) on my mailserver is logging this A LOT: > > 958588648.209920 tcpserver: warning: dropping connection, unable to fork: tempor > ary failure > > I ran strace on the tcpserver and it's getting: > > fork() = -1 EAGAIN (Resource temporarily unavailable) > > Now, EAGAIN means there wasn't enough memory to fork BUT, there is No. EAGAIN means for some _temporary_ reason it cannot fork. Maybe you have reached your max processes limit, globally or per user. Greetz, Peter. -- [EMAIL PROTECTED] - Peter van Dijk [student:developer:madly in love]
tcpserver unable to fork?
Detectives, smtpd (running from tcpserver) on my mailserver is logging this A LOT: 958588648.209920 tcpserver: warning: dropping connection, unable to fork: tempor ary failure I ran strace on the tcpserver and it's getting: fork() = -1 EAGAIN (Resource temporarily unavailable) Now, EAGAIN means there wasn't enough memory to fork BUT, there is haps of free swap on that box. To test, I wrote a little C program that mallocs 20 Mb of memory and then does a fork(), works fine. Anybody got any ideas? Timbo.
Re: tcpserver unable to fork?
[EMAIL PROTECTED] wrote: >In an act of desperation, I started another tcpserver to listen on >another interface. I noticed that I can only run a max of around 150 >smtpd's simultaneously, whether under one tcpserver or two. You're likely hitting some OS resource limit like max processes per user, max file descriptors, etc. -Dave
Re: tcpserver unable to fork?
On Fri, 17 Mar 2000 [EMAIL PROTECTED] wrote: > Today I got the following message in my SMTP logs: > > tcpserver: warning: dropping connection, unable to fork: temporary failure > tcpserver: status: 146/256 In an act of desperation, I started another tcpserver to listen on another interface. I noticed that I can only run a max of around 150 smtpd's simultaneously, whether under one tcpserver or two. > exec /usr/local/bin/softlimit -m 200 \ > /usr/local/bin/tcpserver -c256 -v -p -x /etc/tcp.smtp.cdb \ > -u $QMAILDUID -g $NOFILESGID 0 smtp \ > /usr/local/bin/rblsmtpd /var/qmail/bin/qmail-smtpd 2>& > > Can someone explain what's happening? Brian -- [EMAIL PROTECTED] http://www.baquiran.com AIM: bbaquiran
tcpserver unable to fork?
Today I got the following message in my SMTP logs: tcpserver: warning: dropping connection, unable to fork: temporary failure tcpserver: status: 146/256 I'm currently running qmail-smtpd under supervise with the following line in my run file, broken for readability: exec /usr/local/bin/softlimit -m 200 \ /usr/local/bin/tcpserver -c256 -v -p -x /etc/tcp.smtp.cdb \ -u $QMAILDUID -g $NOFILESGID 0 smtp \ /usr/local/bin/rblsmtpd /var/qmail/bin/qmail-smtpd 2>& Can someone explain what's happening? Brian -- [EMAIL PROTECTED] http://www.baquiran.com AIM: bbaquiran
Re: tcpserver unable to fork
On Thu, Mar 09, 2000 at 02:43:59PM +0530, S Ashok Kumar wrote: > Is there any limit on tcpserver forking processes? I have configured > tcpserver to fork qmail-smtpd with concurrent sessions of 2000. I have > made a simulator that makes upto 2000 connections to qmail-smtpd. But > when the simulator reaches 1247 connections, tcpserver reports error > which is: > > tcpserver: warning: dropping connection, unable to fork: temporary > failure > > I am testing this on a P-III, 500MHz RedHat Linux 6.1 machine with > 512MB RAM and 1GB SWAP. The machine is off-line and there is no queue. I > am only using it to stress test the machine so I can arrive at a value > on number of simultaneous connections this machine can take. The > simulator connects to port 25 and simply says "HELO localhost\r\n". > > /proc/sys/fs/file-max is defined as 65536. Is there any additional > fine-tuning I need to do with the kernel or file-system? Raising the file-max is no good. tcpserver wants to fork and create a new process. Increase your max-proc (or equivalent) limit. -- See complete headers for more info
tcpserver unable to fork
Is there any limit on tcpserver forking processes? I have configured tcpserver to fork qmail-smtpd with concurrent sessions of 2000. I have made a simulator that makes upto 2000 connections to qmail-smtpd. But when the simulator reaches 1247 connections, tcpserver reports error which is: tcpserver: warning: dropping connection, unable to fork: temporary failure I am testing this on a P-III, 500MHz RedHat Linux 6.1 machine with 512MB RAM and 1GB SWAP. The machine is off-line and there is no queue. I am only using it to stress test the machine so I can arrive at a value on number of simultaneous connections this machine can take. The simulator connects to port 25 and simply says "HELO localhost\r\n". /proc/sys/fs/file-max is defined as 65536. Is there any additional fine-tuning I need to do with the kernel or file-system? Thanks in advance. - Ashok
