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Commit c8642720 authored by Vincent Breitmoser's avatar Vincent Breitmoser Committed by Matthew Hodgson
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mention libjemalloc in readme (#3877)

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...@@ -963,5 +963,13 @@ variable. The default is 0.5, which can be decreased to reduce RAM usage ...@@ -963,5 +963,13 @@ variable. The default is 0.5, which can be decreased to reduce RAM usage
in memory constrained enviroments, or increased if performance starts to in memory constrained enviroments, or increased if performance starts to
degrade. degrade.
Using `libjemalloc <http://jemalloc.net/>`_ can also yield a significant
improvement in overall amount, and especially in terms of giving back RAM
to the OS. To use it, the library must simply be put in the LD_PRELOAD
environment variable when launching Synapse. On Debian, this can be done
by installing the ``libjemalloc1`` package and adding this line to
``/etc/default/matrix-synaspse``::
LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1
.. _`key_management`: https://matrix.org/docs/spec/server_server/unstable.html#retrieving-server-keys .. _`key_management`: https://matrix.org/docs/spec/server_server/unstable.html#retrieving-server-keys
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