Form process is not getting cleared and occupying /tmp space

LSOF:

lsof is a command meaning "list open files", which is used in many Unix-like systems to report a list of all open files and the processes that opened them. This open source utility was developed and supported by Victor A. Abell, the retired Associate Director of the Purdue University Computing Center. It works in and supports several Unix flavors.

Open files in the system include disk files, pipes, network sockets and devices opened by all processes. One use for this command is when a disk cannot be unmounted because (unspecified) files are in use. The listing of open files can be consulted (suitably filtered if necessary) to identify the process that is using the files.


# lsof /var
COMMAND     PID     USER   FD   TYPE DEVICE SIZE/OFF   NODE NAME
syslogd     350     root    5w  VREG  222,5        0 440818 /var/adm/messages
syslogd     350     root    6w  VREG  222,5   339098   6248 /var/log/syslog
cron        353     root  cwd   VDIR  222,5      512 254550 /var -- atjobs

To view the port associated with a daemon:

# lsof -i -n -P | grep sendmail
sendmail  31649    root    4u  IPv4 521738       TCP *:25 (LISTEN)

From the above one can see that "sendmail" is listening on its standard port of "25".
-i Lists IP sockets.
-n Do not resolve hostnames (no DNS).
-P Do not resolve port names (list port number instead of its name).
One can also list Unix Sockets by using lsof -U.

The /tmp directory keeps filling up but the space reported with user space tools ("du" for example) is next to nothing.

According to the standard system tools:


Digging deeper with "lsof" we see the following:


[root@mail tmp]# lsof | grep "/tmp"
bash       1970    root  cwd       DIR        9,3       4096          2 /tmp
screen    13507   jgray    3r     FIFO        9,3                 15747 /tmp/uscreens/S-jgray/13507.pts-0.mail
perl      19932  zimbra    1w      REG        9,3      71523         18 /tmp/logswatch.out (deleted)
perl      19932  zimbra    2w      REG        9,3      71523         18 /tmp/logswatch.out (deleted)
zmlogger  19937  zimbra    1w      REG        9,3      71523         18 /tmp/logswatch.out (deleted)
zmlogger  19937  zimbra    2w      REG        9,3      71523         18 /tmp/logswatch.out (deleted)
zmlogger  19937  zimbra    4w      REG        9,3 1884374605         26 /tmp/zmlogger.out (deleted)
mysqld_sa 21321  zimbra    1w      REG        9,3         70         15 /tmp/zmcontrol.out.20738 (deleted)
mysqld_sa 21321  zimbra    2w      REG        9,3         70         15 /tmp/zmcontrol.out.20738 (deleted)
logswatch 21391  zimbra    1w      REG        9,3         82         19 /tmp/logswatch.out
logswatch 21391  zimbra    2w      REG        9,3         82         19 /tmp/logswatch.out
mysqld    21402  zimbra    5u      REG        9,3          0         20 /tmp/ibD4jO0l (deleted)
mysqld    21402  zimbra    6u      REG        9,3          0         21 /tmp/ibzy1fOB (deleted)
mysqld    21402  zimbra    7u      REG        9,3          0         22 /tmp/ibXukIBR (deleted)
mysqld    21402  zimbra    8u      REG        9,3          0         23 /tmp/ibJj1dq7 (deleted)
mysqld    21402  zimbra   12u      REG        9,3          0         25 /tmp/iblBE0Vn (deleted)
perl      21423  zimbra    1w      REG        9,3         82         19 /tmp/logswatch.out
perl      21423  zimbra    2w      REG        9,3         82         19 /tmp/logswatch.out

Regards,
Jaagadish.