Address input/output (I/O) blockages in a Cassandra cluster or low CPU resources by
reviewing the CPU statistics.
-
From a Linux terminal, run the top
command.
Result: The Linux terminal returns a report on system resource usage and
current processes.
-
In the Linux report, find the CPU usage section
(%Cpu(s)).
Result: The CPU usage section shows the percentage of CPU time spent on
various tasks, for
example:
%Cpu(s): 12.8 us, 2.3 sy, 0.0 ni, 84.4 id, 0.3 wa, 0.0 hi, 0.2 si, 0.0 st
The
value of the wa parameter reflects the
time that the CPU spends waiting for
I/O
operations to complete.
-
If the value of the wa parameter is higher
than 1, investigate the
source
of the problem, for example, by performing other
Cassandra troubleshooting procedures.
For more information, see the Troubleshooting section of
the Apache Cassandra documentation.