diff --git a/src/MariaDB.ts b/src/MariaDB.ts
index af29806..7aedabd 100644
--- a/src/MariaDB.ts
+++ b/src/MariaDB.ts
@@ -96,7 +96,7 @@ class MariaDB
     #pool: PoolCluster | null;
     #nodes: Node[];
     #canQueryDonor: boolean;
-    #queryHistogram?: {startTimer: (labels: object) => () => void};
+    static #queryHistogram?: {startTimer: (labels: object) => () => void};
     #server: IServer;
 
     constructor (server: IServer, options: MariaOptions)
@@ -241,16 +241,16 @@ class MariaDB
         {
             this.#logger.warn('Metrics recording was enabled but missing prom-client dependency');
         }
-        else if (this.#config.recordMetrics && Prometheus)
+        else if (this.#config.recordMetrics && Prometheus && !MariaDB.#queryHistogram)
         {
             this.#logger.info('Setting up metric recording');
-            this.#queryHistogram = new Prometheus.Histogram({
+            MariaDB.#queryHistogram = new Prometheus.Histogram({
                 name: 'sql_queries',
-                help: 'Tracks query duration and frequency',
+                help: 'Tracks query duration in seconds and frequency',
                 buckets: Prometheus?.exponentialBuckets(0.005, 2, 10),
                 labelNames: [ 'type' ] as const
             });
-            this.#server.registerMetric(this.#queryHistogram!);
+            this.#server.registerMetric(MariaDB.#queryHistogram!);
         }
 
         this.#_ready = true;
@@ -407,7 +407,7 @@ class MariaDB
         {
             const result = await new Promise<T[] | FieldInfo[] | [OkPacket]| undefined>((resolve, reject) => 
             {
-                const endTimer = this.#queryHistogram?.startTimer({ type: [ 'SELECT', 'UPDATE', 'INSERT', 'DELETE' ].find(entry => query.toUpperCase().includes(entry)) ?? 'OTHER' });
+                const endTimer = MariaDB.#queryHistogram?.startTimer({ type: [ 'SELECT', 'UPDATE', 'INSERT', 'DELETE' ].find(entry => query.toUpperCase().includes(entry)) ?? 'OTHER' });
                 const q = connection.query({ timeout, sql: query }, values, (err, results, fields) => 
                 {
                     if (err) 
diff --git a/src/MongoDB.ts b/src/MongoDB.ts
index 623e9da..5f0742f 100644
--- a/src/MongoDB.ts
+++ b/src/MongoDB.ts
@@ -55,7 +55,7 @@ class MongoDB
 
     #db: Db | null;
     #_client: MongoClient;
-    #queryHistogram?: { startTimer: (labels: object) => () => void };
+    static #queryHistogram?: { startTimer: (labels: object) => () => void };
     #server: IServer;
 
     constructor (server: IServer, config: MongoOptions) 
@@ -145,16 +145,16 @@ class MongoDB
         {
             this.#logger.warn('Metrics recording was enabled but missing prom-client dependency');
         }
-        else if (this.#config.recordMetrics && Prometheus)
+        else if (this.#config.recordMetrics && Prometheus && !MongoDB.#queryHistogram)
         {
             this.#logger.info('Setting up metric recording');
-            this.#queryHistogram = new Prometheus.Histogram({
+            MongoDB.#queryHistogram = new Prometheus.Histogram({
                 name: 'mongo_queries',
-                help: 'Tracks query duration and frequency',
+                help: 'Tracks query duration in seconds and frequency',
                 buckets: Prometheus?.exponentialBuckets(0.005, 2, 10),
                 labelNames: [ 'type' ] as const
             });
-            this.#server.registerMetric(this.#queryHistogram!);
+            this.#server.registerMetric(MongoDB.#queryHistogram!);
         }
 
         this.#logger.status('MongoDB ready');
@@ -198,7 +198,7 @@ class MongoDB
 
         this.#logger.debug(`Incoming find query for ${db} with parameters ${inspect(query)}`);
 
-        const endTimer = this.#queryHistogram?.startTimer({ type: 'find' });
+        const endTimer = MongoDB.#queryHistogram?.startTimer({ type: 'find' });
         const cursor = this.#db.collection<T>(db).find(query as Filter<T>, options);
         const data = await cursor.toArray();
         if (endTimer)
@@ -225,7 +225,7 @@ class MongoDB
             query._id = new ObjectId(query._id);
 
         this.#logger.debug(`Incoming findOne query for ${db} with parameters ${inspect(query)}`);
-        const endTimer = this.#queryHistogram?.startTimer({ type: 'findOne' });
+        const endTimer = MongoDB.#queryHistogram?.startTimer({ type: 'findOne' });
         const result = await this.#db.collection<T>(db).findOne(query as Filter<T>, options);
         if (endTimer)
             endTimer();
@@ -253,7 +253,7 @@ class MongoDB
             filter._id = new ObjectId(filter._id);
 
         this.#logger.debug(`Incoming update query for '${db}' with parameters\n${inspect(filter)}\nand data\n${inspect(data)}`);
-        const endTimer = this.#queryHistogram?.startTimer({ type: 'updateMany' });
+        const endTimer = MongoDB.#queryHistogram?.startTimer({ type: 'updateMany' });
         const result = await this.#db.collection<T>(db).updateMany(filter as Filter<T>, { $set: data }, { upsert });
         if (endTimer)
             endTimer();
@@ -279,7 +279,7 @@ class MongoDB
             filter._id = new ObjectId(filter._id);
 
         this.#logger.debug(`Incoming updateOne query for ${db} with parameters ${inspect(filter)}`);
-        const endTimer = this.#queryHistogram?.startTimer({ type: 'updateOne' });
+        const endTimer = MongoDB.#queryHistogram?.startTimer({ type: 'updateOne' });
         const result = await this.#db.collection(db).updateOne(filter as Filter<Document>, { $set: data }, { upsert });
         if (endTimer)
             endTimer();
@@ -305,7 +305,7 @@ class MongoDB
             data._id = new ObjectId(data._id);
 
         this.#logger.debug(`Incoming insertOne query for ${db} with parameters ${inspect(data)}`);
-        const endTimer = this.#queryHistogram?.startTimer({ type: 'insertOne' });
+        const endTimer = MongoDB.#queryHistogram?.startTimer({ type: 'insertOne' });
         const result = await this.#db.collection(db).insertOne(data);
         if (endTimer)
             endTimer();
@@ -322,7 +322,7 @@ class MongoDB
             filter._id = new ObjectId(filter._id);
 
         this.#logger.debug(`Incoming deleteOne query for ${db} with parameters ${inspect(filter)}`);
-        const endTimer = this.#queryHistogram?.startTimer({ type: 'deleteOne' });
+        const endTimer = MongoDB.#queryHistogram?.startTimer({ type: 'deleteOne' });
         const result = await this.#db.collection(db).deleteOne(filter);
         if (endTimer)
             endTimer();
@@ -340,7 +340,7 @@ class MongoDB
         if (typeof filter._id === 'string')
             filter._id = new ObjectId(filter._id);
 
-        const endTimer = this.#queryHistogram?.startTimer({ type: 'findOneAndDelete' });
+        const endTimer = MongoDB.#queryHistogram?.startTimer({ type: 'findOneAndDelete' });
         const result = await this.#db.collection<T>(db).findOneAndDelete(filter as Filter<T>, { includeResultMetadata: meta });
         if (endTimer)
             endTimer();
@@ -367,7 +367,7 @@ class MongoDB
             filter._id = new ObjectId(filter._id);
 
         this.#logger.debug(`Incoming push query for ${db}, with upsert ${upsert} and with parameters ${inspect(filter)} and data ${inspect(data)}`);
-        const endTimer = this.#queryHistogram?.startTimer({ type: 'push' });
+        const endTimer = MongoDB.#queryHistogram?.startTimer({ type: 'push' });
         const result = await this.#db.collection(db).updateOne(filter, { $push: data }, { upsert });
         if (endTimer)
             endTimer();