diff --git a/pixie-server/src/http.rs b/pixie-server/src/http.rs
index 9826e0d..68d3f3a 100644
--- a/pixie-server/src/http.rs
+++ b/pixie-server/src/http.rs
@@ -136,6 +136,26 @@ async fn image(
     Ok(format!("{updated} computer(s) affected\n").customize())
 }
 
+#[get("/admin/gc")]
+async fn gc(state: Data<State>) -> Result<impl Responder, Box<dyn Error>> {
+    let mut image_stats = state.image_stats.lock().await;
+    let mut chunk_stats = state.chunk_stats.lock().await;
+    let mut cnt = 0;
+    chunk_stats.retain(|k, v| {
+        if v.ref_cnt == 0 {
+            let path = state.storage_dir.join("chunks").join(hex::encode(k));
+            fs::remove_file(path).unwrap();
+            image_stats.total_csize -= v.csize;
+            image_stats.reclaimable -= v.csize;
+            cnt += 1;
+            false
+        } else {
+            true
+        }
+    });
+    Ok(format!("Removed {} chunks\n", cnt))
+}
+
 #[get("/admin/config")]
 async fn get_config(state: Data<State>) -> Result<impl Responder, actix_web::Error> {
     Ok(serde_json::to_string(&state.config))
@@ -188,6 +208,7 @@ pub async fn main(state: Arc<State>) -> Result<()> {
             .app_data(data.clone())
             .service(action)
             .service(image)
+            .service(gc)
             .service(get_config)
             .service(get_units)
             .service(get_hostmap)
diff --git a/pixie-uefi/src/main.rs b/pixie-uefi/src/main.rs
index 08d2bce..579df1e 100644
--- a/pixie-uefi/src/main.rs
+++ b/pixie-uefi/src/main.rs
@@ -38,7 +38,7 @@ async fn server_discover(os: UefiOS) -> Result<Address> {
         let msg = postcard::to_allocvec(&UdpRequest::Discover).unwrap();
         loop {
             socket.send([255; 4], ACTION_PORT, &msg).await?;
-            os.sleep_us(10_000_000).await;
+            os.sleep_us(1_000_000).await;
         }
     };
 
@@ -91,7 +91,7 @@ async fn run(os: UefiOS) -> Result<!> {
         let udp_socket = os.udp_bind(None).await.unwrap();
         loop {
             udp_socket.send(server.ip, 4043, b"pixie").await.unwrap();
-            os.sleep_us(1_000_000).await;
+            os.sleep_us(10_000_000).await;
         }
     });
 
diff --git a/pixie-web/src/main.rs b/pixie-web/src/main.rs
index f7d87c5..13824a7 100644
--- a/pixie-web/src/main.rs
+++ b/pixie-web/src/main.rs
@@ -288,6 +288,12 @@ fn Images<'a, 'b, G: Html>(cx: Scope<'a>, images: &'a ReadSignal<ImageStat>) ->
             tr {
                 td { "Reclaimable" }
                 td { (Bytes(images.get().reclaimable)) }
+                td { }
+                td {
+                    button(id="reclaime", on:click=move |_| send_req("/admin/gc".into()) ) {
+                        "Reclaim disk space"
+                    }
+                }
             }
         }
     }