Tom,
You need to check with the respective DBA team or the server team who ever have a Idea on what might have caused at the bigger snapshot time frame. Use System manager software for good info on snapshot sizes and graph representation.
1. If the amount of space used by snapshots increases, even though the amount of used storage by the files remains unchanged, we could assume that existing files in the volume are undergoing a high rate of change.
2. A large increase in the size of snapshots could also indicate the deletion of files, since a deleted file isn't really deleted until every snapshot referencing the file is removed. The increase in the snapshot size should have a correlating decrease in the main filesystem when a file is deleted.
3. It could be possible for the snapshot storage used to exceed the filesystem storage used based on the rate of change in files, or depending on how old the accumulated snapshots are. Monitoring the size of the snapshots can be a good way to determine how large your snapshot reserve should be.
4. Decreases in snapshot consumption are likely an indication of snapshots being rotated out, or removed from the volume.
Hope it helps!
Regards,
RK
