CODEWITHSUNDEEP
cassandrametricslatency
Sandeep
Sandeep

Reputation: 136

Cassandra read latencies

What is the difference between these read latency metrics?

org.apache.cassandra.metrics.ClientRequest.Read.Latency
org.apache.cassandra.metrics.ColumnFamily.system.batchlog.ReadLatency
org.apache.cassandra.metrics.ColumnFamily.system.batchlog.CoordinatorReadLatency
org.apache.cassandra.metrics.ColumnFamily.system.batchlog.CoordinatorScanLatency

Upvotes: 2

Views: 1206

Answers (1)

Chris Lohfink
Chris Lohfink

Reputation: 16400

The ClientRequest latency is as coordinator, possibly including network latencies between the cluster nodes. The ColumnFamily metrics are local only so its the time to write to memtable/commitlog or pull the data from the sstables.

Upvotes: 1

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