diff --git a/router-bridge/js-src/plan_worker.ts b/router-bridge/js-src/plan_worker.ts
index 0be826b8..7b0bb895 100644
--- a/router-bridge/js-src/plan_worker.ts
+++ b/router-bridge/js-src/plan_worker.ts
@@ -15,6 +15,10 @@ declare namespace Deno {
   }
 }
 
+function memoryUsage(): MemoryUsage {
+  return Deno.core.ops.op_runtime_memory_usage();
+}
+
 let logFunction: (message: string) => void;
 declare let logger: {
   trace: typeof logFunction;
@@ -25,9 +29,9 @@ declare let logger: {
 };
 
 export interface MemoryUsage {
-  /** The number of bytes of the current Deno's process resident set size,
+  /* The number of bytes of the current Deno's process resident set size,
    * which is the amount of memory occupied in main memory (RAM). */
-  rss: number;
+  //rss: number;
   /** The total size of the heap for V8, in bytes. */
   heapTotal: number;
   /** The amount of the heap used for V8, in bytes. */
@@ -128,7 +132,7 @@ type ApiSchemaResult = {
   schema: string;
 };
 type MemoryUsageResult = {
-  rss: number;
+  //rss: number;
   heapTotal: number;
   heapUsed: number;
   external: number;
@@ -280,6 +284,7 @@ async function run() {
     try {
       const { id, payload: event } = await receive();
       messageId = id;
+
       try {
         switch (event?.kind) {
           case PlannerEventKind.UpdateSchema:
@@ -321,12 +326,12 @@ async function run() {
           case PlannerEventKind.GetHeapStatistics:
             logger.info(`received event: ${JSON.stringify(event)}`);
 
-            const mem = Deno.memoryUsage();
-            //const mem = memoryUsage();
+            //const mem = Deno.memoryUsage();
+            const mem = memoryUsage();
 
             logger.info(`got memoryUsage`);
             const result: MemoryUsageResult = {
-              rss: mem.rss,
+              //rss: mem.rss,
               heapTotal: mem.heapTotal,
               heapUsed: mem.heapUsed,
               external: mem.external,
diff --git a/router-bridge/src/planner.rs b/router-bridge/src/planner.rs
index 941acae3..c4ab88cf 100644
--- a/router-bridge/src/planner.rs
+++ b/router-bridge/src/planner.rs
@@ -401,7 +401,7 @@ where
 #[derive(Deserialize, Debug)]
 #[serde(rename_all = "camelCase")]
 pub struct HeapStatistics {
-    pub rss: u64,
+    //pub rss: u64,
     pub heap_total: u64,
     pub heap_used: u64,
     pub external: u64,
@@ -787,6 +787,7 @@ mod tests {
     use futures::stream::StreamExt;
     use futures::stream::{self};
 
+    use core::panic;
     use std::collections::BTreeMap;
 
     use super::*;
diff --git a/router-bridge/src/worker.rs b/router-bridge/src/worker.rs
index b789ee41..d54fa72e 100644
--- a/router-bridge/src/worker.rs
+++ b/router-bridge/src/worker.rs
@@ -1,7 +1,7 @@
 use crate::error::Error;
 use async_channel::{bounded, Receiver, Sender};
-use deno_core::Op;
 use deno_core::{op, Extension, OpState};
+use deno_core::{v8, Op};
 use rand::rngs::StdRng;
 use rand::{thread_rng, Rng};
 use serde::de::DeserializeOwned;
@@ -79,6 +79,7 @@ impl JsWorker {
                     log_warn::DECL,
                     log_error::DECL,
                     op_crypto_get_random_values::DECL,
+                    op_runtime_memory_usage::DECL,
                 ]),
                 op_state_fn: Some(Box::new(move |state| {
                     state.put(response_sender.clone());
@@ -302,6 +303,28 @@ fn op_crypto_get_random_values(state: &mut OpState, out: &mut [u8]) -> Result<()
     Ok(())
 }
 
+// HeapStats stores values from a isolate.get_heap_statistics() call
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+struct MemoryUsage {
+    //rss: usize,
+    heap_total: usize,
+    heap_used: usize,
+    external: usize,
+}
+
+#[op(v8)]
+fn op_runtime_memory_usage(scope: &mut v8::HandleScope<'_>) -> MemoryUsage {
+    let mut s = v8::HeapStatistics::default();
+    scope.get_heap_statistics(&mut s);
+    MemoryUsage {
+        //rss: rss(),
+        heap_total: s.total_heap_size(),
+        heap_used: s.used_heap_size(),
+        external: s.external_memory(),
+    }
+}
+
 #[cfg(test)]
 mod worker_tests {
     use super::JsWorker;