Http Tuning Policy (httpClient-Http StandaloneTuning Policy)

This component configures the network’s rules for evaluating both write requests as well as the acceptable freshness of read requests that result from polling.
Figure 27.   Http Tuning Policy properties
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To access these properties, double-click HttpClient and double-click Http Tuning Policy.

Property Value Description
Write On Start true (default) or false
Determines a writable proxy point’s behavior when the station starts.

true initiates a write when the station first reaches a steady state.

false prevents a write when the station first reaches a steady state.

 
NOTE: Consider setting to false except for critical proxy points, otherwise large networks may experience write-queue-overflow exceptions.
 
Write On Enabled true (default) or false
Determines a writable proxy point’s behavior when the point’s status transitions from disabled to normal (enabled).

true initiates a write when the transition occurs.

false prevents a write when the transition occurs.

Retry On Connection Failure true (default) or false Configures what happens if the connection fails.

true makes a single retry attempt.

false does not retry the connection.

Connect Timeout number of milliseconds
Determines how long a station attempts to connect to a server before the attempt fails. This time should not be too short to cause false connection failures, and not so long as to cause excessive delays when a server is down.
Read Timeout number of milliseconds Defines the maximum amount of time to wait for a response to a read.
Follow Redirects true (default) or false Move content to a new URL.

true, automatically follows any 302 responses to the new address.

false does nothing with a redirect.

Use Caches true (default) or false Controls the Cache-Control http header.

true enables the outgoing Cache-Control http header.

false disables cache.

Request Throttle additional properties Allows a limit on outgoing requests for this client within a configured timeframe.

For property descriptions, refer to “Request Throttle (httpClient-HttpRequestThrottle)”.

Write On Start Randomization number of milliseconds Selects a random maximum number of seconds after the station starts before commencing a send.