show column family sizes at trace level

src/database/abstraction/rocksdb.rs

@@ -1,5 +1,5 @@
 use std::{
-    collections::HashSet,
+    collections::{HashMap, HashSet},
     future::Future,
     pin::Pin,
     sync::{Arc, Mutex, RwLock},
@@ -104,6 +104,16 @@ impl KeyValueDatabaseEngine for Arc<Engine> {
             }),
         )?;
 
+        tracing::trace!(
+            cf_sizes = ?db.live_files().map(|x| {
+                x.into_iter().fold(HashMap::<_, usize>::new(), |mut acc, x| {
+                    *acc.entry(x.column_family_name).or_default() += x.size;
+                    acc
+                })
+            }),
+            "Size in bytes of all column families",
+        );
+
         Ok(Arc::new(Engine {
             rocks: db,
             max_open_files: config.database.rocksdb_max_open_files,