Cannot open hash database /etc/mail/aliases.db: Not enough

[Rambo_1]

Hi

I have a machine RP2430, The problem is that there are no responding to all of commands inputed ,the commands will hang no matter what kind of command inputed interval a few days. I need to login into GSP and reboot the machins to fix the problem. I got some messages in mail.log as below ,Does anyone tell me where is the problem in my OS ?

The mail.log
Jun 28 03:47:01 hzqt4 sendmail[13009]: unable to qualify my own domain name (hzqt4) -- using short name
Jun 28 03:47:01 hzqt4 sendmail[13009]: be sure to set domain name in Dj macro in sendmail.cf
Jun 28 03:47:01 hzqt4 sendmail[13009]: DAA13009: from=root, size=606, class=0, pri=30606, nrcpts=1, msgid=<200706271947.DAA13009@hzqt4>, relay=root@localhost
Jun 28 03:47:01 hzqt4 sendmail[13011]: DAA13009: to=root, ctladdr=root (0/3), delay=00:00:00, xdelay=00:00:00, mailer=local, stat=Sent
Jun 28 04:42:10 hzqt4 sendmail[1234]: runqueue: Skipping queue run -- fork() failed: Not enough space
Jun 28 04:47:00 hzqt4 sendmail[18479]: unable to qualify my own domain name (hzqt4) -- using short name
Jun 28 04:47:00 hzqt4 sendmail[18479]: be sure to set domain name in Dj macro in sendmail.cf
Jun 28 04:47:00 hzqt4 sendmail[18479]: NOQUEUE: SYSERR(root): Cannot open hash database /etc/mail/aliases.db: Not enough space
Jun 28 04:47:00 hzqt4 sendmail[18479]: NOQUEUE: SYSERR(root): dbm map "Alias0": missing map file /etc/mail/aliases
Jun 28 04:47:00 hzqt4 sendmail[18479]: EAA18479: from=root, size=606, class=0, pri=30606, nrcpts=1, msgid=<200706272047.EAA18479@hzqt4>, relay=root@localhost
Jun 28 05:13:20 hzqt4 sendmail[1234]: runqueue: Skipping queue run -- fork() failed: Not enough space
Jun 28 05:44:30 hzqt4 sendmail[1234]: runqueue: Skipping queue run -- fork() failed: Not enough space
Jun 28 06:15:40 hzqt4 sendmail[1234]: runqueue: Skipping queue run -- fork() failed: Not enough space
Jun 28 06:46:50 hzqt4 sendmail[1234]: runqueue: Skipping queue run -- fork() failed: Not enough space
Jun 28 07:18:00 hzqt4 sendmail[1234]: runqueue: Skipping queue run -- fork() failed: Not enough space

Thanks
Rambo

[Dennis Handly]

You need more virtual memory (swap space). If you haven't allocated enough device swap, you can use SAM to allocate file system swap until you can add device swap.

[Nagashankarp]

see this other thread
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=956021

also the last of the error msg indicate, there are quiet of process and hence it can't fork anymore..
but i guess once you fix the first issue, the second should be gone.

[Rambo_1]

What methods to find out the real causes about the swap usage reached 99%.

[Dennis Handly]

>What methods to find out the real causes about the swap usage reached 99%.

You could say the system is under configured or under provisioned.
Or someone went crazy with bad programming and in a recursive fork loop.

Take a look at "ps -ef".

[Dennis Handly]

A hierarchical ps output:
$ UNIX95= ps -Hef