Hello, My set up is Ispconfig3 with Debian Squeeze For last few days, I have been noticing that my emails stop sending/receiving Then I have to login to my admin panel & check under Monitor 1. Show Mail Queue - Most of the time I find 4 or 5 mails 2. Show Mail-warn log - Errors are Jul 15 10:07:27 server1 amavis[2510]: (!)Net::Server: 2012/07/15-10:07:27 Bad fork [Cannot allocate memory]\n at line 166 in file /usr/share/perl5/Net/Server/PreForkSimple.pm Jul 15 12:27:05 server1 amavis[5479]: (05479-01) (!!)file(1) utility (/usr/bin/file) FAILED: run_command: can't fork: Cannot allocate memory at /usr/sbin/amavisd-new line 3077. 3. Show Mail Error log - Errors are Jul 15 12:27:05 server1 amavis[5479]: (05479-01) (!!)file(1) utility (/usr/bin/file) FAILED: run_command: can't fork: Cannot allocate memory at /usr/sbin/amavisd-new line 3077. Then I always login to my Terminal & give following commands root@server1:~# /etc/init.d/amavis restart Stopping amavisd: (not running). Starting amavisd: amavisd-new. root@server1:~# Since amavisd not running then I always try root@server1:~# /etc/init.d/amavis start Starting amavisd: amavisd-new. root@server1:~# Then I do root@server1:~# /etc/init.d/apache2 restart Restarting web server: apache2 ... waiting . root@server1:~# Then my Mail works But this problem is quite presistent for past over 2 weeks Please advice, where could be the problem, from time to time I keep running apt-get update as well as apt-get upgrade Thanks
The problem looks like is that your system is running out of memory. You need to find out what is filling up the memory using free, top, ps etc.... the following one-liner will give you the top 30 most RAM hungry processes: Code: while read command percent rss; do if [[ "${command}" != "COMMAND" ]]; then rss="$(bc <<< "scale=2;${rss}/1024")"; fi; printf "%-26s%-8s%s\n" "${command}" "${percent}" "${rss}"; done < <(ps -A --sort -rss -o comm,pmem,rss|head -31)
Memory Here is the output for memory usage root@server1:~# free -t -m total used free shared buffers cached Mem: 508 478 30 0 3 53 -/+ buffers/cache: 422 86 Swap: 0 0 0 Total: 508 478 30 root@server1:~# top - 09:12:50 up 11 days, 19:00, 1 user, load average: 0.00, 0.11, 0.08 Tasks: 94 total, 1 running, 93 sleeping, 0 stopped, 0 zombie Cpu(s): 0.2%us, 0.0%sy, 0.0%ni, 99.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 521052k total, 478448k used, 42604k free, 3280k buffers Swap: 0k total, 0k used, 0k free, 59444k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 31676 root 20 0 70588 1232 492 S 1.0 0.2 0:00.34 sshd 10917 root 20 0 19072 1348 1016 R 0.3 0.3 0:00.12 top 1 root 20 0 8356 184 56 S 0.0 0.0 0:09.86 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd 3 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 4 root 20 0 0 0 0 S 0.0 0.0 0:00.80 ksoftirqd/0 5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 watchdog/0 6 root 20 0 0 0 0 S 0.0 0.0 1:31.65 events/0 7 root 20 0 0 0 0 S 0.0 0.0 0:00.00 cpuset 8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 khelper 9 root 20 0 0 0 0 S 0.0 0.0 0:00.00 netns 10 root 20 0 0 0 0 S 0.0 0.0 0:00.00 async/mgr 11 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pm 12 root 20 0 0 0 0 S 0.0 0.0 0:00.00 xenwatch 13 root 20 0 0 0 0 S 0.0 0.0 0:00.00 xenbus 14 root 20 0 0 0 0 S 0.0 0.0 0:01.66 sync_supers 15 root 20 0 0 0 0 S 0.0 0.0 0:01.82 bdi-default 16 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kintegrityd/0
The min. recommended memory size for a full setup is 750MB, the recommende size is 2GB. You server ahs just 512MB, so its normal that processes run out of memory. Either you increase the memory of your server or you disable some applications like the email scanner.
Memory Sir, I have increased memory my cloud server from 512 to 756 I have restarted apachc2 Mail warn log is as under Jul 20 08:14:53 server1 amavis[9396]: (!)Net::Server: 2012/07/20-08:14:53 Couldn't fork: [Cannot allocate memory]\n\n at line 293 in file /usr/share/perl5/Net/Server.pm Jul 20 10:29:25 server1 dovecot: dovecot: Killed with signal 15 (by pid=12518 uid=0 code=kill) Jul 20 10:30:02 server1 postfix/postqueue[1499]: warning: Mail system is down -- accessing queue directly
You do not have any swap space configured. Check your settings in /etc/fstab for swap space and execute 'swapon -s'.
Memory Sir, It was created when I had set up server # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc defaults 0 0 /dev/xvda1 / ext3 errors=remount-ro,usrjquota=aquota.user, grpjquota=aquota.group,jqfmt=vfsv0 0 1 ~ ~ ~ ~ ~ ~ ~
Did you follow the tutorial for setting up your disk partitions? Or else why didn't you configure any swap? Can you post the output of 'fdisk -l' please.
Memory Sir, Here is the output root@server1:~# fdisk -l Disk /dev/xvda1: 5368 MB, 5368709120 bytes 255 heads, 63 sectors/track, 652 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/xvda1 doesn't contain a valid partition table root@server1:~# I did follow the tutorial http://www.howtoforge.com/perfect-server-debian-squeeze-with-bind-and-dovecot-ispconfig-3-p4 Edit /etc/fstab. Mine looks like this (I added ,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0 to the partition with the mount point /):
I am afraid you deleted the swap line from /etc/fstab when you edited it. The "Guided Method - Use entire disk" does create a swap partition, as you can see on page 2 of the tutorial. I am not quite sure if I can help further as this might be related to virtualisation. But I wonder where your partition table is. Please post the output of Code: cat /proc/partitions and Code: fdisk -l /dev/xvda Then we might see...
DIsk Sir, root@server1:~# cat /proc/partitions major minor #blocks name 202 1 5242880 xvda1 root@server1:~# And root@server1:~# fdisk -l /dev/xvda root@server1:~# There is no output for fdisk -l /dev/xvda
Sorry, I can't help any further. I do not know why you have only one partition and no swap. Is reinstalling an option for you? Or else you might want to wait for a better expert...
Option Dear Sir, I wait for an Expert's answer. I can reinstall if there's no option Further, I am on VPS & whenever I run apt-get update / upgrade some AMD error is shown & remember I did some changes while correcting the error, which is shown below in "apt-get upgrade" apt-get update Reading package lists... Done W: Duplicate sources.list entry http://security.debian.org/ squeeze/updates/main amd64 Packages (/var/lib/apt/lists/security.debian.org_dists_squeeze_updates_ma in_binary-amd64_Packages) W: You may want to run apt-get update to correct these problems root@server1:~# apt-get upgrade Do you want to continue [Y/n]? Y Setting up linux-image-2.6.32-5-amd64 (2.6.32-45) ... Running depmod. Running update-initramfs. update-initramfs: Generating /boot/initrd.img-2.6.32-5-amd64 Examining /etc/kernel/postinst.d. run-parts: executing /etc/kernel/postinst.d/initramfs-tools 2.6.32-5-amd64 /boot /vmlinuz-2.6.32-5-amd64 run-parts: executing /etc/kernel/postinst.d/zz-update-grub 2.6.32-5-amd64 /boot/ vmlinuz-2.6.32-5-amd64 Searching for GRUB installation directory ... found: /boot/grub Searching for default file ... Generating /boot/grub/default file and setting th e default boot entry to 0 entry not specified. run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1 Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-2.6.3 2-5-amd64.postinst line 799. dpkg: error processing linux-image-2.6.32-5-amd64 (--configure): subprocess installed post-installation script returned error exit status 2 Setting up linux-image-2.6.32-5-xen-amd64 (2.6.32-45) ... configured to not write apport reports Running depmod. Running update-initramfs. update-initramfs: Generating /boot/initrd.img-2.6.32-5-xen-amd64 Examining /etc/kernel/postinst.d. run-parts: executing /etc/kernel/postinst.d/initramfs-tools 2.6.32-5-xen-amd64 / boot/vmlinuz-2.6.32-5-xen-amd64 run-parts: executing /etc/kernel/postinst.d/zz-update-grub 2.6.32-5-xen-amd64 /b oot/vmlinuz-2.6.32-5-xen-amd64 Searching for GRUB installation directory ... found: /boot/grub Searching for default file ... Generating /boot/grub/default file and setting th e default boot entry to 0 entry not specified. run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1 Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-2.6.3 2-5-xen-amd64.postinst line 799. dpkg: error processing linux-image-2.6.32-5-xen-amd64 (--configure): subprocess installed post-installation script returned error exit status 2 configured to not write apport reports Errors were encountered while processing: linux-image-2.6.32-5-amd64 linux-image-2.6.32-5-xen-amd64 E: Sub-process /usr/bin/dpkg returned an error code (1) root@server1:~#
I think he is useing a virtual server and most virtual servers dont have a swap partition. What he can try is to create a swap file as described here: http://www.cyberciti.biz/faq/linux-add-a-swap-file-howto/
Swap Till Sir, I am on cloud server and have done as per instructions. To be sure, I just pasting output of vi/etc/fstab for your confirmation. After making changes, I have rebooted my server # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc /swapfile1 swap swap defaults 0 0 /dev/xvda1 / ext3 errors=remount-ro,usrjquota=aquota.user, grpjquota=aquota.group,jqfmt=vfsv0 0 1 ~ ~ ~
Ok,so your provider vanishes all config changes after a reboot. Please run: swapon /swapfile1 again and then post the output of: free -m
Swap root@server1:~# free -m total used free shared buffers cached Mem: 764 748 16 0 5 193 -/+ buffers/cache: 549 215 Swap: 511 0 511 root@server1:~#
=k, the swap is active. Does your server has a file /etc/rc.local? If yes, add the command: swapon /swapfile1 to that file. so that the swap gets activated after a reboot.
swap Sir, I do have /etc/rc.local & have added the line output is as under #!/bin/sh -e # # rc.local # # This script is executed at the end of each multiuser runlevel. # Make sure that the script will "exit 0" on success or any other # value on error. # # In order to enable or disable this script just change the execution # bits. # # By default this script does nothing. swapon /swapfile1 exit 0 ~ ~
