Introduction
By default, the size of the cPanel-generated /tmp
filesystem is 4GB, or 5% of the /usr
filesystem size, whichever is smaller. You may wish to increase the size of this filesystem so it can hold more data.
Caveats
- We recommend this procedure only be performed by an advanced system administrator and only during a scheduled dedicated time since it requires temporarily stopping the services that write to
/tmp
. - This procedure only works on servers on which cPanel has generated
/tmp
. cPanel-generated/tmp
filesystems have/dev/loop
in their names, for example:[root@server]# df -h /tmp
Filesystem Size Used Avail Use% Mounted on
/dev/loop0 477M 2.4M 449M 1% /tmpIf your server's current
/tmp
filesystem does not contain/dev/loop
in its name, the filesystem was created outside by cPanel by the server's operating system or data center, and you will need to seek assistance from your data center with increasing the size of/tmp
. -
This procedure does not work on servers running in Virtuozzo or VZ environments.
Procedure
- 1. Modify this line in
/scripts/securetmp
to settmpdsksize
to the desired size--for example, for 10 GB: -
my $tmpdsksize = 10485760
- 2. Comment out this section of
/scripts/securetmp
: -
my $five_percent_of_available = ( $available * 0.05 );
if ( $five_percent_of_available > $tmpdsksize ) {
$tmpdsksize = $five_percent_of_available;
}
my $FOUR_GIG_k = ( 1024 * 1024 * 4 );
if ( $tmpdsksize > $FOUR_GIG_k ) {
$tmpdsksize = $FOUR_GIG_k;
} - 3. Temporarily disable monitoring for the services using
/tmp
: -
whmapi1 configureservice service=cpsrvd enabled=1 monitored=0
whmapi1 configureservice service=mysql enabled=1 monitored=0
whmapi1 configureservice service=httpd enabled=1 monitored=0
-
4. Stop the services that use
/tmp
: -
/scripts/restartsrv_cpsrvd --stop
-
/scripts/restartsrv_mysql --stop
-
/scripts/restartsrv_httpd --stop
- 5. Unmount
/tmp
and/var/tmp
: -
umount -l /tmp
-
umount -l /var/tmp
- 6. Move
/usr/tmpDSK
file to another location (in case you need to mount it elsewhere to preserve data): -
mv /usr/tmpDSK /usr/tmpDSK_bak
7. Run this script to create the larger
/tmp
filesystem: -
/scripts/securetmp
8. Restart the services you stopped previously:
/scripts/restartsrv_cpsrvd --start
/scripts/restartsrv_mysql --start
/scripts/restartsrv_httpd --start
-
9. Re-enable monitoring for the services:
-
whmapi1 configureservice service=cpsrvd enabled=1 monitored=1
whmapi1 configureservice service=mysql enabled=1 monitored=1
whmapi1 configureservice service=httpd enabled=1 monitored=1
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