Increase in backend connections to PGbouncer

Summary

We're seeing an increase in backend connections to PGBouncer. No customer

Service(s) affected : pgbouncer Team attribution : ~"team::Dev & Ops" (?) Minutes downtime or degradation : Ongoing

Timeline

2019-08-01

• 20:55 UTC - Saturation alert triggered https://gitlab.slack.com/archives/CD6HFD1L0/p1564692946236100
• 21:35 UTC - Updated to ~S2 since this seems to be affecting view timings https://dashboards.gitlab.net/d/thYzurImk/rails-controllers?orgId=1&from=1564690459031&to=1564695796757
• 21:57 UTC - pgbouncer stats start to go down https://dashboards.gitlab.net/d/PwlB97Jmk/pgbouncer-overview?orgId=1&from=1564692385958&to=1564696603606
• 21:58 UTC - ongres in the incident call says this incident seems to have the same causes as the previous one