cinder/releasenotes/notes/volume_init_max_objects_ret...

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---
upgrade:
- Volume Manager now uses the configuration option
``init_host_max_objects`` retrieval to set max number of
volumes and snapshots to be retrieved per batch during
volume manager host initialization. Query results will
be obtained in batches from the database and not in one
shot to avoid extreme memory usage.
Default value is 0 and disables this functionality.