Server Pools and Server Instances
l
Optimization Threshold
controls how frequently Equalizer adjusts dynamic weights. If Equal-
izer adjusts server weights too aggressively, oscillations in server weights can occur and
cluster-wide performance can suffer. On the other hand, if Equalizer does not adjust
weights often enough, server overloads might not be compensated for quickly enough and
cluster-wide performance can suffer.
Aggressive Load Balancing
After you fine-tune the initial weights of each server in the cluster, you might discover that
Equalizer is not adjusting the dynamic weights of the servers at all: the dynamic weights are very
stable, even under a heavy load. In this case, you might want to set the cluster’s load balancing
response parameter to
fast
. Then Equalizer tries to optimize the performance of your servers
more aggressively; this should improve the overall cluster performance. For more information
about setting server weights, see
"Adjusting a Server’s Initial Weight"
Dynamic Weight Oscillations
If you notice a particular server’s dynamic weight oscillates (for example, the dynamic weight
varies from far below 100 to far above 100 and back again), you might benefit by choosing
slow
response for the cluster. You should also investigate the reason for this behavior; it is possible
that the server application is behaving erratically.
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Copyright © 2014 Coyote Point Systems, A Subsidiary of Fortinet, Inc.
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