Fix the database storage size limit

quickpeep_raker/src/storage.rs

@@ -7,7 +7,7 @@ use crate::storage::records::{
 };
 use anyhow::{anyhow, bail, ensure, Context};
 use libmdbx::{
-    Database, DatabaseFlags, Environment, EnvironmentFlags, Transaction, TransactionKind,
+    Database, DatabaseFlags, Environment, EnvironmentFlags, Geometry, Transaction, TransactionKind,
     WriteFlags, WriteMap, RO, RW,
 };
 use log::info;
@@ -106,7 +106,19 @@ impl RakerStore {
         let mut flags = EnvironmentFlags::default();
         flags.no_sub_dir = true;
 
+        let mut geom = Geometry::default();
+        // Don't stop the database growing until it hits 64 GiB.
+        // (The default is 1 MiB which is just not enough!)
+        geom.size = Some(1024 * 1024..64 * 1024 * 1024 * 1024);
+
+        // Grow 16 MiB at a time.
+        geom.growth_step = Some(16 * 1024 * 1024);
+        // Shrink 64 MiB at a time.
+        geom.shrink_threshold = Some(64 * 1024 * 1024);
+        // (Yes these numbers represent a large database).
+
         let env = Environment::new()
+            .set_geometry(geom)
             .set_max_dbs(256)
             .set_flags(flags)
             .open(path)?;