205a8b3037
Secure RBAC, along with numerous periodics, and even some common API access patterns heavily access the ironic database and sometimes cause queries across multiple columns to match nodes to return. None of this is bad, but what is bad is we didn't have indexes on these columns. This change adds docs, and the schema upgrade to create the column indexes, and a release note to provide more visible documentation for operators. It must be stressed that this does *not* improve query times when all records are asked for on a database connection. Also adds an upgrade check in to raise a warning for operator visibility. Story: 2008863 Task: 42392 Change-Id: I76821c032180a58d0f99d31110fbe0f844c0cb3f |
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