[SERVER-45614] Tailor snapshot window to resize according to cache pressure measured against MongoDB v4.4's WT version Created: 16/Jan/20 Updated: 27/Oct/23 Resolved: 20/Jul/20 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | Storage |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Task | Priority: | Major - P3 |
| Reporter: | Dianna Hohensee (Inactive) | Assignee: | Backlog - Storage Execution Team |
| Resolution: | Gone away | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Assigned Teams: |
Storage Execution
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| Participants: |
| Description |
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The LAS table is going away in v4.4 and being replaced by a history table. The snapshot window is currently resized based on in-memory cache pressure, which is indicated by stats around reading/writing from/to the LAS table rather than the in-memory WT cache. With MongoDB v4.4's WT, we will likely need a new solution for snapshot window resizing. |
| Comments |
| Comment by Connie Chen [ 20/Jul/20 ] |
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This was subsumed by the long-running snapshot reads project |