Fix RocksDB: The info log (LOG, LOG.old.*) grows without limit because log rotation and retention are left at RocksDB defaults

CHANGELOG.md

@@ -25,6 +25,7 @@ If you are upgrading from v0.16.x, replace the binary (or run `docker pull`). If
   - DNSBL answers with several return codes, such as a Spamhaus ZEN listing in both SBL and PBL, are scored for only the first code returned.
   - DNSBL lookups that return "not listed" are cached for 24 hours regardless of the zone's negative TTL.
 - MTA: Queue quotas with an empty `match` expression are never enforced, including the global queue quota created on first start.
+- RocksDB: The info log (`LOG`, `LOG.old.*`) grows without limit because log rotation and retention are left at RocksDB defaults.
 
 ## [0.16.24] - 2026-09-27
 

crates/store/src/backend/rocksdb/main.rs

@@ -24,6 +24,8 @@ const CHURN_DELETION_WINDOW: usize = 4096;
 const CHURN_DELETION_TRIGGER: usize = 1024;
 const CHURN_DELETION_RATIO: f64 = 0.5;
 const BYTES_PER_SYNC: u64 = 1024 * 1024;
+const MAX_LOG_FILE_SIZE: usize = 10 * 1024 * 1024;
+const KEEP_LOG_FILE_NUM: usize = 5;
 
 #[derive(Clone, Copy)]
 enum CfProfile {
@@ -115,6 +117,8 @@ impl RocksDbStore {
             .set_db_write_buffer_size((config.buffer_size as usize).max(MIN_DB_WRITE_BUFFER_SIZE));
         db_opts.set_bytes_per_sync(BYTES_PER_SYNC);
         db_opts.set_wal_bytes_per_sync(BYTES_PER_SYNC);
+        db_opts.set_max_log_file_size(MAX_LOG_FILE_SIZE);
+        db_opts.set_keep_log_file_num(KEEP_LOG_FILE_NUM);
 
         Ok(Store::RocksDb(Arc::new(RocksDbStore {
             db: OptimisticTransactionDB::open_cf_descriptors(&db_opts, idx_path, cfs)