From a0d6a5591f929f521d82f9f4e3fed8ef7a7da2c0 Mon Sep 17 00:00:00 2001
From: Olaoluwa Osuntokun <laolu32@gmail.com>
Date: Wed, 2 Apr 2025 14:36:59 -0700
Subject: [PATCH] kvdb/sqlite: enable incremental auto_vacuum on DB creation

In this commit, we make a change that enables the `auto_vacuum =
incremental` pragma for SQLite databases, but only when the database
file is first created. Incremental auto-vacuum allows SQLite to reclaim
unused space within the database file over time, preventing indefinite
growth.
---
 kvdb/sqlite/db.go | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/kvdb/sqlite/db.go b/kvdb/sqlite/db.go
index f04bec3be..07a6d07cf 100644
--- a/kvdb/sqlite/db.go
+++ b/kvdb/sqlite/db.go
@@ -24,6 +24,12 @@ const (
 	sqliteTxLockImmediate = "_txlock=immediate"
 )
 
+// pragmaOption holds a key-value pair for a SQLite pragma setting.
+type pragmaOption struct {
+	name  string
+	value string
+}
+
 // NewSqliteBackend returns a db object initialized with the passed backend
 // config. If a sqlite connection cannot be established, then an error is
 // returned.
@@ -31,10 +37,7 @@ func NewSqliteBackend(ctx context.Context, cfg *Config, dbPath, fileName,
 	prefix string) (walletdb.DB, error) {
 
 	// First, we add a set of mandatory pragma options to the query.
-	pragmaOptions := []struct {
-		name  string
-		value string
-	}{
+	pragmaOptions := []pragmaOption{
 		{
 			name: "busy_timeout",
 			value: fmt.Sprintf(
@@ -49,7 +52,12 @@ func NewSqliteBackend(ctx context.Context, cfg *Config, dbPath, fileName,
 			name:  "journal_mode",
 			value: "WAL",
 		},
+		{
+			name:  "auto_vacuum",
+			value: "incremental",
+		},
 	}
+
 	sqliteOptions := make(url.Values)
 	for _, option := range pragmaOptions {
 		sqliteOptions.Add(