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I was troubleshooting a master-0 pod eviction due to disk pressure.
The pod was shutdown
Ephemeral space reclaimed (85% to 73%) – Deleted unused images from the node (I.E. docker image purge …)
The pod was started and master-0 came back online
Right after the restart I saw the disk space usage drop to 38% but found no events in the journal or other logs indicating how the additional space was acquired. Looking at the disk metrics I was able to map the time of the disk space increase to the startup of SQL Server, specifically TEMPDB.
The TEMPDB had grown large, prior to the restart (auto