SERVER-42697 Add setParameter tcmallocReleaseRate

1 files changed, 23 insertions, 0 deletions

diff --git a/jstests/noPassthroughWithMongod/tcmalloc.js b/jstests/noPassthroughWithMongod/tcmalloc.js
new file mode 100644
index 00000000000..e69850fc8e0
--- /dev/null
+++ b/jstests/noPassthroughWithMongod/tcmalloc.js
@@ -0,0 +1,23 @@
+// Assert setting tcmalloc_release_rate with setParameter.
+
+(function() {
+"use strict";
+
+// Check that setParameter is available on this build. And whether tcmallocReleaseRate is.
+function hasTcSetParameter() {
+    const commandResult = db.adminCommand({getParameter: 1, tcmallocReleaseRate: 1});
+    if (commandResult.ok)
+        return true;
+    else
+        return false;
+}
+
+if (hasTcSetParameter()) {
+    assert.commandWorked(db.adminCommand({setParameter: 1, tcmallocReleaseRate: 10}));
+    assert.commandWorked(db.adminCommand({setParameter: 1, tcmallocReleaseRate: 5.0}));
+    assert.commandWorked(db.adminCommand({setParameter: 1, tcmallocReleaseRate: 0.01}));
+    assert.commandWorked(db.adminCommand({setParameter: 1, tcmallocReleaseRate: 0}));
+    assert.commandFailed(db.adminCommand({setParameter: 1, tcmallocReleaseRate: -1.0}));
+    assert.commandFailed(db.adminCommand({setParameter: 1, tcmallocReleaseRate: "foo"}));
+}
+}());
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