1 files changed, 8 insertions, 1 deletions
diff --git a/ext/node/polyfills/os.ts b/ext/node/polyfills/os.ts
index 06de4ad44..d1f5e7bfa 100644
--- a/ext/node/polyfills/os.ts
+++ b/ext/node/polyfills/os.ts
@@ -159,7 +159,14 @@ export function endianness(): "BE" | "LE" {
 
 /** Return free memory amount */
 export function freemem(): number {
-  return Deno.systemMemoryInfo().free;
+  if (Deno.build.os === "linux") {
+    // On linux, use 'available' memory
+    // https://github.com/libuv/libuv/blob/a5c01d4de3695e9d9da34cfd643b5ff0ba582ea7/src/unix/linux.c#L2064
+    return Deno.systemMemoryInfo().available;
+  } else {
+    // Use 'free' memory on other platforms
+    return Deno.systemMemoryInfo().free;
+  }
 }
 
 /** Not yet implemented */