[OAK-2791] Change default for oak.mongo.maxDeltaForModTimeIdxSecs

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.2.2, 1.3.0, 1.4
• Component/s: core, mongomk
• Assignee: Marcel Reutegger
• Reporter: Marcel Reutegger
• Created: 21/Apr/15 06:53
• Updated: 02/Mar/16 11:34
• Resolved: 21/Apr/15 07:29

Description

OAK-1966 introduced a hint for MongoDB to either use the _id or _modified
index, depending on the time delta of the _modified constraint. The default
value is currently -1, which mean MongoDocumentStore will always pass an _id
hint. I would like to enable the _modified hint for small deltas less than
60 seconds. Now that OAK-2131 is implemented, the number of background updates
is much lower and a query with a _modified constraint will better match
documents that actually have been modified since a given timestamp.