9002
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Ran 13 Apr 2018 01:28AM UTC

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Files 85

Run time 4s

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Build # 9002

Build Type

cron

travis-ci

Committed by

cpu

Commit Message

Allow configuring gRPC's MaxConcurrentStreams (#3642)

During periods of peak load, some RPCs are significantly delayed (on the order of seconds) by client-side blocking. HTTP/2 clients have to obey a "max concurrent streams" setting sent by the server. In Go's HTTP/2 implementation, this value [defaults to 250](https://github.com/golang/net/blob/master/http2/server.go#L56), so the gRPC default is also 250. So whenever there are more than 250 requests in progress at a time, additional requests will be delayed until there is a slot available.

During this peak load, we aren't hitting limits on CPU or memory, so we should increase the max concurrent streams limit to take better advantage of our available resources. This PR adds a config field to do that.

Fixes #3641.

Coverage Stats

9893 of 15845 relevant lines covered (62.44%)

0.69 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
5	9002.5 (RUN="coverage")	13 Apr 2018 01:28AM UTC	0	62.44	Travis Job 9002.5

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