Size the Connection Pool Before It Runs Dry
A connection pool is a fixed set of reusable links to a service, and every worker that holds one while it waits on a slow call takes it out of circulation. When enough workers do this the pool empties, new work waits for a link rather than for a server, and the delay looks like a slow backend. This skill covers keeping a pool healthy for agent work: size it above peak use with headroom, set a hold limit shorter than the slowest call, always return a link even on failure, and watch the number of waiters so an empty pool is seen before work starts to fail.
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An empty pool looks like a slow backend
Size the Connection Pool Before It Runs Dry# An empty pool looks like a slow backend A connection pool is a fixed set of reusable links. Every worker that holds one while it waits on a slow call takes it out of circulation, and once enough workers do this the pool empties. New work then waits for a link, not for a server, so the delay looks
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