FreeSWITCH DB In RAMdrive
Moving the ephemeral databases to a RAM disk will greatly improve performance, and it is CRITICAL to move them to a RAM disk if you use SSDs. More info on running FreeSWITCH on SSDs is here.
Some Linux distros have quirks that cause SQLite to behave poorly when scaling up. In other cases, disk I/O becomes a bottleneck to FreeSWITCH performance. Putting the FreeSWITCH core.db file onto a RAM disk can increase performance.
1) In /etc/fstab, add a mountpoint and save.
tmpfs /usr/local/freeswitch/ramdb tmpfs defaults 0 0
2) Make sure you also create the directory.
mkdir /usr/local/freeswitch/ramdisk mount -a
3) Then, in freeswitch/conf/autoload_configs/switch.conf.xml uncomment core-db-name and set it to the path you created in fstab.
<param name="core-db-name" value="/usr/local/freeswitch/ramdisk/core.db" />
4) Restart FreeSWITCH