Add histogram for maximum concurrent requests per connection #12241
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Signed-off-by: Greg Greenway <[email protected]>
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mattklein123
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Jul 23, 2020
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Aug 11, 2020
…e so that two with the same name map to the same histogram object. (#12275) Commit Message: Creates a storage model for thread-local histograms enabling continuity of data across scope reloads. Previously, whenever a Scope was re-created, the counters, gauges, and text-readouts of the same names would retain their previous values. However, fresh histograms were created on every scope reload, and stats dumps would include duplicate histograms with the same name. This change adds an analogous name-based set of histograms, held in ThreadLocalStore, so that we have a single histogram representing all its generations of data. This is somewhat more complex than for the other stats, since there were thread-local buffers, which previously were owned by TlsScope and needed to be made independent. So this introduces a new tls histogram map in the tls-cache to maintain this. This should help unblock #12241. Additional Description: Risk Level: high (not clear whether this is enough testing of histogram usage) Testing: //test/... Docs Changes: n/a Release Notes: n/a Fixes: #3098 Signed-off-by: Joshua Marantz <[email protected]>
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Signed-off-by: Greg Greenway [email protected]
Commit Message: This gives visibility into concurrent connections, and can help in setting an appropriate value for
http2_protocol_options.max_concurrent_streams.Additional Description:
Risk Level: low
Testing: TODO
Docs Changes: TODO
Release Notes: TODO
[Optional Runtime guard:]
[Optional Fixes #Issue]
[Optional Deprecated:]