Derek Collison 99fed910f0 Improvements to large numbers of JetStream R1 consumers per stream. ...

1. We were holding open FDs longer than we should for consumers causing issues with open FD limits. We now do not hold them open and cap updates a bit better.

2. When doing a stream delete, consumer delete was repeating alot of work that was not necessary, causing longer delays. This has been optimized a bit, still more improvements to be made.

3. We cover all JS under a single export, but that was also trapping GetNext for pull based consumers, and since this was a no-op (is handled at user account level) we were creating alot of garbage service import responses and reverse map entries that had to be garbage collected. We have a fix in to avoind this but still looking for a better one.

4. Still had some lingering references to all exports vs single JS export.

Signed-off-by: Derek Collison <derek@nats.io>

2021-06-29 05:45:55 -07:00

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