[OAK-10918] Embed and log an explain for the fullgc mongo query

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.66.0
• Component/s: documentmk
• Epic Link: Support for Full Garbage Collection
• Assignee: Stefan Egli
• Reporter: Stefan Egli
• Created: 24/Jun/24 17:03
• Updated: 6 days ago 16:59
• Resolved: 6 days ago 16:59

Description

We should do an explain of the query that is ultimately used in MongoGCSupport for fullgc, and log (at INFO) the most relevant pieces of the winning plan (or just the entire winning plan). Doing this once per reconfig (which is probably currently once per JVM-incarnation) shouldn't be intrusive - but it would make it observable which, if any, index is being used. Eg it should say something like

                            "stage": "IXSCAN",
                            "indexName": "_modified_1__id_1",

Issue Links

• blocks: OAK-10914 fullGC exclude paths should use _modified_id index