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A server is attached to a cluster via a server pool. A server pool is a collection of server definitions, each of which has additional parameters assigned to it in the server pool -- these additional parameters are organized by the server’s name and are referred to as server instances within the server pool context. This allows you to associate a distinct set of server instance options (weight, flags, maximum number of connections), to multiple instances of the same real server in different server pools.

This test monitors the connections, data traffic, compressed data traffic and compressed HTTP responses for each server pool. Using the metrics of this test, administrators can promptly detect load imbalances and quickly resolve the issue before any serious discrepancies occur.

Measurement	Description	Measurement Unit	Interpretation
Pool_status_total_conns	Indicates the total number of connections that are available for this server pool.	Number	If a sudden/consistent increase in the value of this measure is noticed, you might have to investigate further to identify the reason for this occurrence.
Pool_status_active_conns	Indicates the number of connections that are currently active on this server pool.	Number	This measure indicates the connection load on the server pool. By observing the graph of this measure over time, you can analyze the rate of growth of the load on the server. By comparing the value of this measure across all the clusters, you can instantly identify overloaded clusters; this in turn brings irregularities in load balancing to light.
Pool_conn_usage	Indicates the percentage of connections that were used by this server pool.	Percent
Pool_status_total_trans	Indicates the total number of transactions performed by this server pool.	Number
Pool_status_receive	Indicates the amount of data received by this server pool.	KB	Comparing the values of these measures across the server pools will help you identify the server pool that is the busiest in the Coyote Load Balancer. This in turn, helps the administrators to identify load balancing irregularities, if any.
Pool_status_sent	Indicates the amount of data transmitted from this server pool.	KB
Pool_status_curr_compres	Indicates the number of HTTP responses that were compressed by this server pool.	Number
Pool_status_tot_compres	Indicates the total number of HTTP responses that were compressed by this server pool since the start of the Coyote Load Balancer.	Number
Pool_status_comp_input	Indicates the amount of compressed data received by this server pool.	KB	Comparing the values of these measures across the server pool will help you identify the server pool that is the busiest in the Coyote Load Balancer. This in turn, helps the administrators to identify load balancing irregularities, if any.
Pool_status_comp_output	Indicates the amount of compressed data transmitted through this server pool.	KB