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Is latency 19ms bad?
Message
From
27/06/2016 15:21:58
 
General information
Forum:
Visual FoxPro
Category:
Other
Miscellaneous
Thread ID:
01637745
Message ID:
01637757
Views:
73
>Hi,
>
>A customer is having an issue of VFP9 application being slow (when used from desktops). The IT guy sent me the following message:
>
>"The server is located in our corporate data center with slightly more latency, about 19ms, that doesn't seem like it should be this slow though."
>
>Is 19ms latency very bad and could cause the application being slow? What are the typical ranges of latency?

What type of connection is between the desktops running your app, and the "corporate data center"?

If the desktops and the center are in the same physical location, and on the same LAN then latency should be less than 1 millisecond. A LAN link should also have high bandwidth, so with those two things a reasonably well designed VFP app working against VFP tables should perform adequately.

A 19ms latency says to me the link is either WAN/Internet (in which case 19ms is fairly decent) or maybe something in between a WAN and a LAN (i.e. a MAN/dedicated point-to-point link, which is not uncommon for "corporate data centers"). Either of those will also have lower bandwidth than a LAN.

Writing this I seem to recall replying to a similar earlier message from you - here it is: Message#1630960
Regards. Al

"Violence is the last refuge of the incompetent." -- Isaac Asimov
"Never let your sense of morals prevent you from doing what is right." -- Isaac Asimov

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