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NIFI-3769 - Document detail value of 'nifi.provenance.repository.warm.cache.frequency'

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Andre F de Miranda 2017-05-02 18:43:58 +10:00 committed by Mark Payne
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nifi-docs/src/main/asciidoc/administration-guide.adoc
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@ -2227,7 +2227,7 @@ Providing three total locations, including _nifi.provenance.repository.director
NiFi will periodically open each Lucene index and then close it, in order to "warm" the cache. This will result in far faster queries when the Provenance Repository is large. As with NiFi will periodically open each Lucene index and then close it, in order to "warm" the cache. This will result in far faster queries when the Provenance Repository is large. As with
all great things, though, it comes with a cost. Warming the cache does take some CPU resources, but more importantly it will evict other data from the Operating System disk cache and all great things, though, it comes with a cost. Warming the cache does take some CPU resources, but more importantly it will evict other data from the Operating System disk cache and
will result in reading (potentially a great deal of) data from the disk. This can result in lower NiFi performance. However, if NiFi is running in an environment where CPU and disk will result in reading (potentially a great deal of) data from the disk. This can result in lower NiFi performance. However, if NiFi is running in an environment where CPU and disk
are not fully utilized, this feature can result in far faster Provenance queries. are not fully utilized, this feature can result in far faster Provenance queries. The default value for this property is blank (i.e. disabled).
|==== |====
[[encrypted-write-ahead-provenance-repository-properties]] [[encrypted-write-ahead-provenance-repository-properties]]