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ref https://linear.app/ghost/issue/ENG-1783/add-time-to-create-connection-metric - Since we've added the "time to acquire" metric to get visibility into contention in the connection pool, we've seen some anomalies where it takes a surprisingly long time to acquire a connection (~60ms) when not under load. Hypothesis is that these anomalies occur when there aren't any open connections, so Ghost has to establish a new connection with the DB, and that's the part that's actually taking most of that time. This new metric should help confirm/deny that hypothesis. - This will also be an interesting metric to keep an eye on and/or alert on — if Ghost can't create new connections with its database performantly, it's not going to perform very well. |
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