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Network Tuning

Network performance is influenced by the Maximum Transmission Unit size, send and receive buffer size, port filtering, duplex settings, and Domain Name lookup.

TCP/IP Buffer Size

Server performance can be improved by tuning the buffer size that is used by TCP/IP.

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In most network environments, performance will be improved by increasing these buffers to a minimum of 65535.

Domain Name Server Lookup

TCP/IP connection performance can be improved if the registered DNS servers are available and performing well.

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If the JSM_OPEN Built-In Function is slow to open a connection, then you could have a DNS lookup issue. Add an entry to the local host table to improve performance.

Change TCP/IP Domain
Host name search priority           *LOCAL
Domain name server
Internet address                    139.130.4.4
                                    203.48.48.13

If the first Domain Name Server (DNS) in the list does not respond, the second DNS server in the list will be contacted. If the second DNS server does not respond, the third DNS server will be contacted.

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