Profiling Ceph memory
Memory profiling is the process of dynamic program analysis to determine a program's memory consumption and identify ways to optimize it. In this recipe, we discuss how you can use memory profilers on the Ceph daemons for memory investigation.
How to do it…
- Start the memory profiler on a specific daemon:
# ceph tell osd.0 heap start_profilerNote
To auto-start profiler as soon as the ceph OSD daemon starts, set the environment variable as
CEPH_HEAP_PROFILER_INIT=true. - It's a good idea to keep the profiler running for a few hours so that it can collect as much information related to memory footprint as possible. At the same time, you can also generate some load on the cluster.
- Next, print heap statistics about the memory footprint ...
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