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FreeSWITCH DB in RAMdrive

About​

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.

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Discussion​

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.

Example​

  1. In /etc/fstab, add a mountpoint and save. 
    1. tmpfs    /usr/local/freeswitch/ramdisk     tmpfs   defaults        0 0

  2. Make sure you also create the directory. 
    1. 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. 
    1. <param name="core-db-name" value="/usr/local/freeswitch/ramdisk/core.db" />

  4. Restart FreeSWITCH