public type PoolConfiguration record {|
    # Max active connections per route(host:port). Default value is -1 which indicates unlimited.
    int maxActiveConnections = maxActiveConnections;
    # Maximum number of idle connections allowed per pool.
    int maxIdleConnections = maxIdleConnections;
    # Maximum amount of time (in seconds), the client should wait for an idle connection before it sends an error when the pool is exhausted
    decimal waitTime = waitTime;
    ...
    # Minimum evictable time for an idle connection in seconds. Default value is 5 minutes
    decimal minEvictableIdleTime = minEvictableIdleTime;
    # Time between eviction runs in seconds. Default value is 30 seconds
    decimal timeBetweenEvictionRuns = timeBetweenEvictionRuns;
    ...
|};

import ballerina/http;

service /app on new http:Listener(9090) {

    resource function get api() returns string {
        return "Hello, World!";
    }
}

import ballerina/http;
import ballerina/lang.runtime;

http:PoolConfiguration poolConfig = {
    minEvictableIdleTime: 5,
    timeBetweenEvictionRuns: 5
};

final http:Client clientEP = check new ("http://localhost:9090/app", poolConfig = poolConfig);

public function main() returns error? {
    http:Response _ = check clientEP->/api;
    runtime:sleep(2);

    http:Response _ = check clientEP->/api;
    runtime:sleep(15);

    // Expects a new connection to be made since the connection is IDLE for the configured time
    http:Response _ = check clientEP->/api;
}