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This is documentation for Caché & Ensemble.

For information on converting to InterSystems IRIS, see the InterSystems IRIS Adoption Guide and the InterSystems IRIS In-Place Conversion Guide, both available on the WRC Distributions page (login required).

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Enable/disable the Nagle algorithm for Telnet.


[Miscellaneous]    UseNagleAlgorithm=n


The Nagle algorithm makes Telnet more efficient. It reduces the number of IP packets sent over the network by consolidating messages that are sent within a small time interval into a single IP packet. When the Nagle algorithm is enabled, the operating system waits some interval before actually committing the data from a send command, in the hopes that the application will call send again with more data that can be consolidated with the first. For details see

The value of the UseNagleAlgorithm setting may be 1 or 0:

  • When 1 (true), use the Nagle algorithm.

  • When 0 (false), do not use it.



Range of Values

0 or 1. The default is 0.

Management Portal

On the page System Administration > Configuration > Additional Settings > Compatibility, in the UseNagleAlgorithm row, select Edit. Choose true (selected) or false (cleared).

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