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doc/cephadm: OSD memory autotuning for hyperconverged

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Signed-off-by: Sebastian Wagner <sewagner@redhat.com>
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Sebastian Wagner 2021-11-16 12:52:20 +01:00
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doc/cephadm/install.rst
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@ -318,9 +318,21 @@ available and unused device:
See :ref:`cephadm-deploy-osds` for more detailed instructions. See :ref:`cephadm-deploy-osds` for more detailed instructions.
In case the cluster runs on hardware that is used exclusively for Enabling OSD memory autotuning
Ceph, it is recommended to enable ``osd_memory_target_autotune``. ------------------------------
See :ref:`osd_autotune`.
It is recommended to enable ``osd_memory_target_autotune``.
in order to maximise the performance of the cluster. See :ref:`osd_autotune`.
In case the cluster hardware is not exclusively used by Ceph (hyperconverged),
reduce the memory consuption of Ceph like so:
.. prompt:: bash #
# hyperconverged only:
ceph config set mgr mgr/cephadm/autotune_memory_target_ratio 0.2
Then enable memory autotuning:
.. prompt:: bash # .. prompt:: bash #