deltatocumulative: evict only stale streams #33015
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changes eviction behavior at limit to only delete streams if they are actually stale. Current behavior just deletes the oldest, which leads to rapid deletion of all streams under heavy load, making this processor unusable.
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RichieSams
reviewed
May 13, 2024
RichieSams
reviewed
May 13, 2024
| @@ -59,5 +59,5 @@ func (m HashMap[T]) Clear() { | |||
| // Evictors remove the "least important" stream based on some strategy such as | |||
| // the oldest, least active, etc. | |||
| type Evictor interface { | |||
| Evict() identity.Stream | |||
| Evict() (identity.Stream, bool) | |||
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Can you document what the returns are
RichieSams
approved these changes
May 15, 2024
jpkrohling
approved these changes
May 16, 2024
| // if not already tracked and no space: try to evict | ||
| if !exist && m.Map.Len() >= m.Max { | ||
| errl := ErrLimit(m.Max) | ||
| gone, ok := m.Evictor.Evict() |
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for a future PR: it would be nice to have an eviction counter, if there isn't one already
|
I'm merging, as @sh0rez is out for a week and I think the comments from this PR can be addressed in a follow-up PR. |
jpkrohling
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May 29, 2024
**Description:** fixes broken check in eviction behavior such that it only evicts actually stale metrics. this was already attempted in #33015, but was insufficient **Testing:** tests were added
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changes eviction behavior at limit to only delete streams if they are actually stale. Current behavior just deletes the oldest, which leads to rapid deletion of all streams under heavy load, making this processor unusable.
Description:
Link to tracking Issue:
Fixes #33014
Testing:
Documentation: