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Feature #17694

open

[Keep][keep-web] improve observability of buffer cache

Added by Ward Vandewege almost 3 years ago. Updated about 2 months ago.

Status:
New
Priority:
Normal
Assigned To:
-
Category:
-
Target version:
Future
Story points:
-
Release:
Postponed
Release relationship:
Auto

Description

The keep-web buffer cache can cause a major performance bottleneck when it is not configured appropriately for the traffic load. This problem is more or less invisible from prometheus because we lack metrics

Add metrics for:

  • number of blocks in use in the WebDAVCache
  • block churn - can we expose # of blocks that were evicted from the cache while in use? If that's not possible, maybe just the # of cache evictions.
  • CollectionBytes in use in the WebDAVCache
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