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TIBCO Rendezvous® 8.7.0

# Adjusting Member Weights

Member processes can change their weight using the set weight call.

Set Weight Call

C | `tibrvftMember_SetWeight()`
C++ | `TibrvFtMember::setWeight()`
Java | `TibrvFtMember.setWeight()`
.NET | Weight is an instance property of `FTGroupMember`.

A program that can determine its own suitability for its task can adjust its weight accordingly, as in these examples. (Nonetheless, changing weight frequently can cause thrashing.)

## Example 1: Resources

Consider a situation in which program performance depends upon a resource, such as long distance communications lines. Such a program could vary its weight as a function of available lines.

## Example 2: Load

If a program can detect that its host computer has become heavily loaded, the program could lower its weight, allowing a member on a lightly loaded computer to become active in its place.

## Example 3: System Administrator

In a third example, system administration staff track the availability of resources and the performance of various computers. In response to such information, an administrator could send a message instructing a member process to change its weight.

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