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add documentation for the local disk cache TTL config

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AmineChikhaoui 2018-04-02 17:41:49 +01:00
parent 2855c3d965
commit 86930ed414
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2 changed files with 32 additions and 6 deletions
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24
doc/manual/command-ref/conf-file.xml
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@ -788,6 +788,30 @@ password <replaceable>my-password</replaceable>
</varlistentry>
<varlistentry xml:id="conf-negative-disk-cache-ttl"><term><literal>negative-disk-cache-ttl</literal></term>
<listitem>
<para>The TTL in seconds for negative lookups. If a store path is queried from a substituer but
was not found, there will be a negative lookup cached in the local disk cache database for the specified
duration.</para>
</listitem>
</varlistentry>
<varlistentry xml:id="conf-positive-disk-cache-ttl"><term><literal>positive-disk-cache-ttl</literal></term>
<listitem>
<para>The TTL in seconds for positive lookups. If a store path is queried from a substituer, the result of
the query will be cached in the local disk cache database including some of the NAR metadata. Setting a TTL
for positive lookups can be useful in case of builds that aren't reproducible, in which case having a more
frequent cache invalidation would prevent hash mismatch issues.</para>
</listitem>
</varlistentry>
</variablelist>