diff --git a/src/db/mod.rs b/src/db/mod.rs
index f46e7a48..7eed3bd7 100644
--- a/src/db/mod.rs
+++ b/src/db/mod.rs
@@ -104,7 +104,7 @@ pub async fn init_config() {
             }),
             site: Set(crate::config::site::Config {
                 title: String::from("CdsCTF"),
-                description: String::from("CdsCTF is a CTF platform."),
+                description: String::from("Reality is an illusion, the universe is a hologram."),
                 color: String::from("#0C4497"),
                 favicon: String::from(""),
             }),
diff --git a/src/metric/mod.rs b/src/metric/mod.rs
index 36b4e878..83abd526 100644
--- a/src/metric/mod.rs
+++ b/src/metric/mod.rs
@@ -25,7 +25,7 @@ pub static MEMORY_USAGE: Lazy<IntGauge> = Lazy::new(|| {
 });
 
 pub static MEMORY_USAGE_RATIO: Lazy<Gauge> = Lazy::new(|| {
-    let opts = Opts::new("memory_usage_bytes", "Memory usage in bytes")
+    let opts = Opts::new("memory_usage_ratio", "Memory usage ratio")
         .namespace(crate::env::get_env().metric.namespace.clone());
     let gauge = Gauge::with_opts(opts).expect("metric can be created");
     METRICS_REGISTRY.register(Box::new(gauge.clone())).unwrap();
diff --git a/src/model/challenge/mod.rs b/src/model/challenge/mod.rs
index 5b255d86..33b49f27 100644
--- a/src/model/challenge/mod.rs
+++ b/src/model/challenge/mod.rs
@@ -35,9 +35,9 @@ pub struct Model {
     #[sea_orm(default_value = 1800)]
     pub duration: i64,
     pub ports: Vec<i32>,
-    #[sea_orm(column_type = "Json")]
+    #[sea_orm(column_type = "JsonBinary")]
     pub envs: Vec<Env>,
-    #[sea_orm(column_type = "Json")]
+    #[sea_orm(column_type = "JsonBinary")]
     pub flags: Vec<Flag>,
     pub created_at: i64,
     pub updated_at: i64,
diff --git a/src/model/pod/mod.rs b/src/model/pod/mod.rs
index be0d49d8..6ae7facf 100644
--- a/src/model/pod/mod.rs
+++ b/src/model/pod/mod.rs
@@ -19,7 +19,7 @@ pub struct Model {
     pub team_id: Option<i64>,
     pub game_id: Option<i64>,
     pub challenge_id: i64,
-    #[sea_orm(column_type = "Json")]
+    #[sea_orm(column_type = "JsonBinary")]
     pub nats: Vec<Nat>,
     pub removed_at: i64,
     pub created_at: i64,
diff --git a/src/web/router/metric/worker.rs b/src/web/router/metric/worker.rs
index 49d3a59e..19d50ce9 100644
--- a/src/web/router/metric/worker.rs
+++ b/src/web/router/metric/worker.rs
@@ -1,10 +1,10 @@
 use std::time::Duration;
 
-use sysinfo::System;
+use sysinfo::{Pid, System};
 use tokio::time::interval;
 use tracing::info;
 
-use crate::metric::{CPU_USAGE, MEMORY_USAGE};
+use crate::metric::{CPU_USAGE, MEMORY_USAGE, MEMORY_USAGE_RATIO};
 
 pub async fn init() {
     tokio::spawn(async {
@@ -14,14 +14,19 @@ pub async fn init() {
         loop {
             sys.refresh_all();
 
-            let total_memory = sys.total_memory();
-            let used_memory = sys.used_memory();
-            let memory_usage = (used_memory as f64 / total_memory as f64 * 100.0) as i64;
+            let pid = std::process::id();
+            if let Some(process) = sys.process(Pid::from_u32(pid)) {
+                let used_memory = process.memory();
+                MEMORY_USAGE.set(used_memory as i64);
 
-            MEMORY_USAGE.set(memory_usage);
+                let total_memory = sys.total_memory();
+                let memory_usage = used_memory as f64 / total_memory as f64 * 100.0;
 
-            let cpu_usage = sys.global_cpu_usage() as i64;
-            CPU_USAGE.set(cpu_usage);
+                MEMORY_USAGE_RATIO.set(memory_usage);
+
+                let cpu_usage = process.cpu_usage() as i64;
+                CPU_USAGE.set(cpu_usage);
+            }
 
             tokio::time::sleep(interval).await;
         }