Clam-av won't start causing mail issues

I'm having some problems, no idea what caused them, but I can't get clamav-daemon to start

I get this when trying to start
(clam av log)
Wed Apr 16 12:22:02 2014 -> +++ Started at Wed Apr 16 12:22:02 2014
Wed Apr 16 12:22:02 2014 -> clamd daemon 0.97.8 (OS: linux-gnu, ARCH: x86_64, CPU: x86_64)
Wed Apr 16 12:22:02 2014 -> Log file size limited to -1 bytes.
Wed Apr 16 12:22:02 2014 -> Reading databases from /var/lib/clamav
Wed Apr 16 12:22:02 2014 -> Not loading PUA signatures.
Wed Apr 16 12:22:02 2014 -> Bytecode: Security mode set to "TrustSigned".
Wed Apr 16 12:22:09 2014 -> Loaded 3310648 signatures.
Wed Apr 16 12:22:10 2014 -> LOCAL: Unix socket file /var/run/clamav/clamd.ctl
Wed Apr 16 12:22:10 2014 -> LOCAL: Setting connection queue length to 15
Wed Apr 16 12:22:10 2014 -> ERROR: daemonize() failed: Cannot allocate memory
Wed Apr 16 12:22:10 2014 -> Socket file removed.

And when trying to send/receive mail I get this error
(mail log)
Apr 16 12:36:51 vps2 amavis[24299]: (24299-09) (!)connect to /var/run/clamav/clamd.ctl failed, attempt #1: Can't connect to UNIX socket /var/run/clamav/clamd.ctl: No such file or directory
Apr 16 12:36:52 vps2 dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=81.149.192.161, lip=82.196.10.23, mpid=26160, TLS, session=<P4PNKyj3tABRlcCh>
Apr 16 12:36:52 vps2 dovecot: imap-login: Login: user=<[email protected]>, method=PLAIN, rip=81.149.192.161, lip=82.196.10.23, mpid=26162, TLS, session=<f+7SKyj3tgBRlcCh>
Apr 16 12:36:52 vps2 amavis[24299]: (24299-09) (!)connect to /var/run/clamav/clamd.ctl failed, attempt #1: Can't connect to UNIX socket /var/run/clamav/clamd.ctl: No such file or directory
Apr 16 12:36:52 vps2 amavis[24299]: (24299-09) (!)ClamAV-clamd: All attempts (1) failed connecting to /var/run/clamav/clamd.ctl, retrying (2)
Apr 16 12:36:58 vps2 amavis[24299]: (24299-09) (!)connect to /var/run/clamav/clamd.ctl failed, attempt #1: Can't connect to UNIX socket /var/run/clamav/clamd.ctl: No such file or directory
Apr 16 12:36:58 vps2 amavis[24299]: (24299-09) (!)ClamAV-clamd av-scanner FAILED: run_av error: Too many retries to talk to /var/run/clamav/clamd.ctl (All attempts (1) failed connecting to /var/run/clamav/clamd.ctl) at (eval 114) line 603.\n

Now I can see it's saying "can't allocate memory" but I have plenty of ram available

Output of cat /proc/meminfo
MemTotal: 1019048 kB
MemFree: 333952 kB
Buffers: 7900 kB
Cached: 187248 kB
SwapCached: 0 kB
Active: 517740 kB
Inactive: 98660 kB
Active(anon): 424756 kB
Inactive(anon): 6764 kB
Active(file): 92984 kB
Inactive(file): 91896 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 10044 kB
Writeback: 0 kB
AnonPages: 421380 kB
Mapped: 21168 kB
Shmem: 10200 kB
Slab: 31196 kB
SReclaimable: 13968 kB
SUnreclaim: 17228 kB
KernelStack: 2200 kB
PageTables: 21516 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 509524 kB
Committed_AS: 1538928 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 1888 kB
VmallocChunk: 34359736471 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 34804 kB
DirectMap2M: 1013760 kB

and I can see I've got over 300mb of ram

I've googled and googled and I can't see anything thats overly helpful, and I need to get this sorted quick as I realize it occasionally stops sending emails (which requires restarting amavisd and postfix to fix).

Apart from that emails work fine, sending receiving works all good, just that error.

If for the short term I can get this error to stop stopping postfix (Postfix/amavisd - connect to 127.0.0.1[127.0.0.1]:10024: Connection refused) or at the very least a way to poll the service and restart it if it's failed, then I know emails will be active, but ideally need a fix as having no av is not a particularly good idea especially when dealing with a fair few email domains.

Running ISPConfig 3 on Ubuntu 13.04

Around the same time this happened, I did add a new email domain to ISPConfig with the spam filter set to "normal" normally I set the spam filter to the email address, but can't say if it was the same time.

Cheers!

 

Thanks Till,

root@vps2:~# swapon -s
Filename Type Size Used Priority

So no swap file!
Do you have a link or something on how to add a swap file? I can see a few around but I trust a reliable source from you guys more than a google search!

Cheers

 

Brilliant all is working! Thanks so much!

On another note, I know I should put this in a separate thread, but I was looking at some posts from around 2011 about changing the welcome email, I want to include just a link to a page or attach a file (for instructions on how to setup the email client etc) just wandering if there is any way to do this at all.