From 9d9bc2ae1420d91cea7779f38d329579e1ec126a Mon Sep 17 00:00:00 2001 From: Tao Wang Date: Thu, 11 Aug 2016 10:44:53 +0800 Subject: [PATCH] Update tuning.md --- docs/tuning.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/tuning.md b/docs/tuning.md index 1ed14091c054..976f2eb8a7b2 100644 --- a/docs/tuning.md +++ b/docs/tuning.md @@ -115,7 +115,7 @@ Although there are two relevant configurations, the typical user should not need as the default values are applicable to most workloads: * `spark.memory.fraction` expresses the size of `M` as a fraction of the (JVM heap space - 300MB) -(default 0.6). The rest of the space (25%) is reserved for user data structures, internal +(default 0.6). The rest of the space (40%) is reserved for user data structures, internal metadata in Spark, and safeguarding against OOM errors in the case of sparse and unusually large records. * `spark.memory.storageFraction` expresses the size of `R` as a fraction of `M` (default 0.5).