We upgraded to M3 last night and noticed on our spamfilter server disk mem is being mounted several times

/dev/shm 153600 264 153336 1% /opt/zimbra/amavisd-new-2.3.3/tmp

It gets mounted multiple times after boot up
that number also begins to grow

After boot it was mounted 2 times, but after 16 mins of up time it shows thats its been mounted 6 times.
/etc/fstab only shows one entry.

Here is my df

/dev/shm 153600 264 153336 1% /opt/zimbra/amavisd-new-2.3.3/tmp
/dev/ram0 31729 409 31320 2% /mnt/rd
/dev/shm 153600 264 153336 1% /opt/zimbra/amavisd-new-2.3.3/tmp
/dev/shm 153600 264 153336 1% /opt/zimbra/amavisd-new-2.3.3/tmp
/dev/shm 153600 264 153336 1% /opt/zimbra/amavisd-new-2.3.3/tmp
/dev/shm 153600 264 153336 1% /opt/zimbra/amavisd-new-2.3.3/tmp
/dev/shm 153600 264 153336 1% /opt/zimbra/amavisd-new-2.3.3/tmp