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    Slow response in TWO_TASK caused by distance between App server <-> Firewall <-> DB server

     

    • Product: Aleph
    • Product Version: 20, 21, 22, 23
    • Relevant for Installation Type: Dedicated-Direct, Direct, Local, Total Care

     

    Description

    After moving to or changing a TWO_TASK server setup, I/O intensive functions, such as indexing jobs, take longer than they did previously. 

    Resolution

    In at least one case, this slowness was caused by the fact that each communication between the App and DB servers (which were less than 1m apart) was going through a firewall, which was 35km away (70km, round-trip), which was slowing them down.  Pings were taking an average of 2.8 ms -- while 0.7ms was the normal, expected latency.

     


    • Article last edited: 30-Mar-2016