1 files changed, 11 insertions, 0 deletions
diff --git a/src/mongo/db/mongod_options.cpp b/src/mongo/db/mongod_options.cpp
index 921de16e082..3824340a934 100644
--- a/src/mongo/db/mongod_options.cpp
+++ b/src/mongo/db/mongod_options.cpp
@@ -146,6 +146,13 @@ Status addMongodOptions(moe::OptionSection* options) {
                            "value of slow for profile and console log")
         .setDefault(moe::Value(100));
 
+    general_options
+        .addOptionChaining("operationProfiling.slowOpSampleRate",
+                           "slowOpSampleRate",
+                           moe::Double,
+                           "fraction of slow ops to include in the profile and console log")
+        .setDefault(moe::Value(1.0));
+
     general_options.addOptionChaining("profile", "profile", moe::Int, "0=off 1=slow, 2=all")
         .setSources(moe::SourceAllLegacy);
 
@@ -1044,6 +1051,10 @@ Status storeMongodOptions(const moe::Environment& params) {
         serverGlobalParams.slowMS = params["operationProfiling.slowOpThresholdMs"].as<int>();
     }
 
+    if (params.count("operationProfiling.slowOpSampleRate")) {
+        serverGlobalParams.sampleRate = params["operationProfiling.slowOpSampleRate"].as<double>();
+    }
+
     if (params.count("storage.syncPeriodSecs")) {
         storageGlobalParams.syncdelay = params["storage.syncPeriodSecs"].as<double>();
         if (storageGlobalParams.syncdelay < 0 ||