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[IMPROVED] Reduce contention for high connections in a JetStream enabled account with high API usage. #4613

Merged
merged 1 commit into from Oct 1, 2023
Merged

[IMPROVED] Reduce contention for high connections in a JetStream enabled account with high API usage. #4613

merged 1 commit into from Oct 1, 2023

Commits on Sep 30, 2023

  1. Optimizations to reduce contention for high connections in a JetStrea… 

    …m enabled account with high API usage.

Several strategies which are listed below.

1. Checking a RaftNode to see if it is the leader now uses atomics.
2. Checking if we are the JetStream meta leader from the server now uses an atomic.
3. Accessing the JetStream context no longer requires a server lock, uses atomic.Pointer.
4. Filestore syncBlocks would hold msgBlock locks during sync, now does not.

Signed-off-by: Derek Collison <derek@nats.io>
    @derekcollison
    derekcollison committed Sep 30, 2023
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