29894217393
77%

Ran 22 Jul 2026 06:41AM UTC

Jobs 1

Files 67

Run time 1min

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Committed 21 Jul 2026 02:10PM UTC coverage: 76.645% (+0.09%) from 76.553%

Build # 29894217393

Build Type

push

github

Committed by

web-flow

Commit Message

[IMPROVED] Recycle msg block buffer on weak cache GC (#8395)

Follow-up of https://github.com/nats-io/nats-server/pull/8380.

In `firstSeqForSubj` and `recalculateForSubj` the weak cache would be
loaded as a side-effect of `if mb.cacheNotLoaded()` but would not be
weakened again due to missing `mb.finishedWithCache()` calls.

Additionally, if any block's weak caches were GC'ed their buffers
wouldn't be recycled, potentially requiring to re-allocate new buffers
that would otherwise have been recycled for reuse. This PR updates that
too, when a weak cache is garbage collected, it recycles the cache's
buffer back into the block pool. This should prevent pathological cases
where GC runs and collects many weak caches and buffers, to then require
a bunch of allocations of fresh buffers for subsequent block loads, only
to then trigger GC and collect those buffers again.

Coverage Stats

72379 of 94434 relevant lines covered (76.65%)

429747.68 hits per line

Coverage Regressions

Lines	Coverage	∆	File
1753	79.42	0.3%	src/github.com/nats-io/nats-server/server/filestore.go
408	70.26	-0.16%	src/github.com/nats-io/nats-server/server/monitor.go
17	74.27	-0.16%	src/github.com/nats-io/nats-server/server/jetstream_api.go
14	80.36	0.65%	src/github.com/nats-io/nats-server/server/raft.go
13	82.97	-0.01%	src/github.com/nats-io/nats-server/server/jetstream_cluster.go
7	86.74	0.06%	src/github.com/nats-io/nats-server/server/accounts.go
7	63.08	0.02%	src/github.com/nats-io/nats-server/server/opts.go
5	72.27	-0.14%	src/github.com/nats-io/nats-server/server/memstore.go
4	76.24	-0.07%	src/github.com/nats-io/nats-server/server/leafnode.go
3	87.71	0.39%	src/github.com/nats-io/nats-server/server/consumer.go
3	85.13	0.28%	src/github.com/nats-io/nats-server/server/events.go
2	98.58	-1.42%	src/github.com/nats-io/nats-server/server/jetstream_versioning.go
2	86.35	0.04%	src/github.com/nats-io/nats-server/server/stream.go

Jobs

ID	Job ID	Ran	Files	Coverage
1	29894217393.1	22 Jul 2026 06:41AM UTC	67	76.65	GitHub Action Run

nats-io / nats-server / 29894217393
77%

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