Cloud SQL Auth Proxy v2.5.0 max_connections flag: unbounded queueing versus instance max_connections boundary
Context Cloud SQL Auth Proxy v2.5.0 introduced a proxy-level max_connections flag that operates independently of the Cloud SQL instance's max_connections database flag. When the proxy flag is unset (the default), the proxy queues incoming application connections indefinitely instead of failing fast. This queues masks pool exhaustion as latency spikes rather
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