Merge pull request #1826 from github/henrymercer/increase-reserved-scaling-factor

Increase scaling factor for reserved RAM to 5%

Author: henrymercer

lib/util.js

@@ -53,14 +53,14 @@ const GET_MEMORY_FLAG_TESTS = [
     totalMemoryMb: 64 * 1024,
     platform: "linux",
     expectedMemoryValue: 63 * 1024,
-    expectedMemoryValueWithScaling: 63078, // Math.floor(1024 * (64 - 1 - 0.025 * (64 - 8)))
+    expectedMemoryValueWithScaling: 61644, // Math.floor(1024 * (64 - 1 - 0.05 * (64 - 8)))
   },
   {
     input: undefined,
     totalMemoryMb: 64 * 1024,
     platform: "win32",
     expectedMemoryValue: 62.5 * 1024,
-    expectedMemoryValueWithScaling: 62566, // Math.floor(1024 * (64 - 1.5 - 0.025 * (64 - 8)))
+    expectedMemoryValueWithScaling: 61132, // Math.floor(1024 * (64 - 1.5 - 0.05 * (64 - 8)))
   },
 ];
 

lib/util.js.map

@@ -160,9 +160,9 @@ function getSystemReservedMemoryMegaBytes(
   const fixedAmount = 1024 * (platform === "win32" ? 1.5 : 1);
 
   if (isScalingReservedRamEnabled) {
-    // Reserve an additional 2.5% of the amount of memory above 8 GB, since the amount used by
-    // the kernel for page tables scales with the size of physical memory.
-    const scaledAmount = 0.025 * Math.max(totalMemoryMegaBytes - 8 * 1024, 0);
+    // Reserve an additional 5% of the amount of memory above 8 GB, since the amount used by the
+    // kernel for page tables scales with the size of physical memory.
+    const scaledAmount = 0.05 * Math.max(totalMemoryMegaBytes - 8 * 1024, 0);
     return fixedAmount + scaledAmount;
   } else {
     return fixedAmount;