[Proxy] Use shared internal and external executor for broker clients #13834
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lhotari
added
type/performance
area/proxy
doc-not-needed
lhotari
requested review from
ivankelly,
merlimat,
addisonj,
rdhabalia,
hangc0276,
eolivelli,
315157973,
codelipenghui,
hezhangjian and
michaeljmarshall
codelipenghui
approved these changes
Jan 19, 2022
eolivelli
approved these changes
Jan 19, 2022
@eolivelli I don't. The main impact is the fact that more threads won't be created when the number of proxy connections increase. btw. I noticed a surprising detail of the client usage in the proxy: the client isn't used at all. I'll revisit this PR. |
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This PR has been replaced with an improved solution in #13836. |
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#13839 is for using shared executors for broker client / geo-replication clients |
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Motivation
Pulsar Proxy will create a new Pulsar Client instance for each and every proxied connection.
Currently 2 threads will be created for every Pulsar Client instance for the internal/IO and external/listener executors. This causes a lot of overhead and inefficiency in the Pulsar Proxy.
In the current solution, it's already possible to share the EventLoopGroup and HashedWheelTimer instances. Support for sharing the timer was added by #9802.
A recently merged PR, #12037, added support for sharing the the internal/IO and external/listener executors in PulsarClientImpl instances. This feature has been used in this PR to share the executors across all PulsarClientImpl instances created in the Pulsar Proxy.
Modifications
brokerClientNumIOThreadswhich can be used to configure the number of threads for the internal/IO executor. It defaults to 2 * number of available processors.