* chore: reduce pipelining latency by reusing existing shard fibers
To prove the benefits, run `./dfly_bench --pipeline=50 -n 20000 --ratio 0:1 --qps=0 --key_maximum=1`
Before: the average pipelining latency was 10ms
After: the average pipelining latency is 5ms.
Avg latency: pipelined_latency_usec / total_pipelined_squashed_commands
Also, improved counting of squashed commands - to count actual squashed ones.
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Signed-off-by: Roman Gershman <roman@dragonflydb.io>
* chore: export pipeline related metrics
Export in /metrics
1. Total pipeline queue length
2. Total pipeline commands
3. Total pipelined duration
Signed-off-by: Roman Gershman <roman@dragonflydb.io>
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Signed-off-by: Roman Gershman <roman@dragonflydb.io>
Should allow track caches where Dragonfly is not responsive to I/O
due to big CPU tasks. Also, update the local grafana dashboard.
Signed-off-by: Roman Gershman <roman@dragonflydb.io>
The dashboard used `dragonfly_up` metric to boostrap itself
but this metric does not exist anymore. I replaced it with `dragonfly_version`
In addition, the exported format changed slightly because I used the
recent grafana version to export.
Signed-off-by: Roman Gershman <roman@dragonflydb.io>
