RedisMetricclient_backend_usage
The number of active connections to the SQL Warehouse.
OpenTelemetry (1)Summary
Represents the current utilization of the client backend connection pool, typically as a count or percentage. High usage indicates active connection consumption, while consistent high values suggest potential pool exhaustion. This metric is critical for identifying connection pool starvation patterns that can block application threads waiting for available connections.
Interface Metrics (1)
OpenTelemetry
Knowledge Base (1 documents, 0 chunks)
Technical Annotations (3)
Configuration Parameters (1)
max_connectionsTechnical References (2)
PgBouncercomponentProxySQLcomponentRelated Insights (5)
High bolt connections combined with client backend wait time indicates connection pool exhaustion, causing clients to queue for available connections and degrading application response times.
High client_backend_wait_time combined with low client_backend_usage indicates application connection pool misconfiguration or excessive connection churn, even when database-side cloudsql_googleapis_com/database/network/connections appears normal.
When client_backend_create_time and client_backend_wait_time are elevated, new connections are queuing because the instance is saturated with connection requests. This often precedes connection pool exhaustion and instance instability.