diff --git a/apps/server/src/diagnostics/ProcessDiagnostics.ts b/apps/server/src/diagnostics/ProcessDiagnostics.ts
index b39d560a228..8127f9e8138 100644
--- a/apps/server/src/diagnostics/ProcessDiagnostics.ts
+++ b/apps/server/src/diagnostics/ProcessDiagnostics.ts
@@ -443,11 +443,11 @@ function readWindowsProcessRows(): Effect.Effect<
   ChildProcessSpawner.ChildProcessSpawner
 > {
   const command = [
-    "$processes = Get-CimInstance Win32_Process | ForEach-Object {",
-    '$perf = Get-CimInstance Win32_PerfFormattedData_PerfProc_Process -Filter "IDProcess = $($_.ProcessId)" -ErrorAction SilentlyContinue;',
-    "[pscustomobject]@{ ProcessId = $_.ProcessId; ParentProcessId = $_.ParentProcessId; Name = $_.Name; CommandLine = $_.CommandLine; Status = $_.Status; WorkingSetSize = $_.WorkingSetSize; PercentProcessorTime = if ($perf) { $perf.PercentProcessorTime } else { 0 } }",
-    "};",
-    "$processes | ConvertTo-Json -Compress -Depth 3",
+    "$perfData=@{};Get-CimInstance Win32_PerfFormattedData_PerfProc_Process -ErrorAction SilentlyContinue|ForEach-Object{$perfData[$_.IDProcess]=$_};",
+    "Get-CimInstance Win32_Process|ForEach-Object{",
+    "$perf=$perfData[$_.ProcessId];",
+    "[pscustomobject]@{ProcessId=$_.ProcessId;ParentProcessId=$_.ParentProcessId;Name=$_.Name;CommandLine=$_.CommandLine;Status=$_.Status;WorkingSetSize=$_.WorkingSetSize;PercentProcessorTime=if($perf){$perf.PercentProcessorTime}else{0}}",
+    "}|ConvertTo-Json -Compress -Depth 3",
   ].join(" ");
 
   return runProcess({
diff --git a/apps/server/src/diagnostics/ProcessResourceMonitor.test.ts b/apps/server/src/diagnostics/ProcessResourceMonitor.test.ts
index d9c4eb06ef1..b718c15e6cd 100644
--- a/apps/server/src/diagnostics/ProcessResourceMonitor.test.ts
+++ b/apps/server/src/diagnostics/ProcessResourceMonitor.test.ts
@@ -118,8 +118,8 @@ describe("ProcessResourceMonitor", () => {
       expect(result.topProcesses).toHaveLength(1);
       expect(result.topProcesses[0]?.avgCpuPercent).toBe(20);
       expect(result.topProcesses[0]?.maxCpuPercent).toBe(30);
-      expect(result.topProcesses[0]?.cpuSecondsApprox).toBe(2);
-      expect(result.totalCpuSecondsApprox).toBe(2);
+      expect(result.topProcesses[0]?.cpuSecondsApprox).toBe(6);
+      expect(result.totalCpuSecondsApprox).toBe(6);
       expect(result.buckets.some((bucket) => bucket.maxCpuPercent === 30)).toBe(true);
     }),
   );
diff --git a/apps/server/src/diagnostics/ProcessResourceMonitor.ts b/apps/server/src/diagnostics/ProcessResourceMonitor.ts
index 6030e4172e1..65d442ab431 100644
--- a/apps/server/src/diagnostics/ProcessResourceMonitor.ts
+++ b/apps/server/src/diagnostics/ProcessResourceMonitor.ts
@@ -17,7 +17,7 @@ import * as ChildProcessSpawner from "effect/unstable/process/ChildProcessSpawne
 
 import * as ProcessDiagnostics from "./ProcessDiagnostics.ts";
 
-const SAMPLE_INTERVAL_MS = 5_000;
+const SAMPLE_INTERVAL_MS = 15_000;
 const RETENTION_MS = 60 * 60_000;
 const MAX_RETAINED_SAMPLES = 20_000;