diff --git a/config.yaml.example b/config.yaml.example
index e8840a9..c46a89c 100644
--- a/config.yaml.example
+++ b/config.yaml.example
@@ -10,6 +10,11 @@ database:
   name: "himewiki"
   sslmode: "disable"
 
+vacuum:
+    check-every: 250
+    threshold: 68719476736
+    image-threshold: 68719476736
+
 site:
   base: "https://wiki.example.org/"
   name: "HimeWiki"
diff --git a/internal/action/edit.go b/internal/action/edit.go
index 1b530ad..7a30c7c 100644
--- a/internal/action/edit.go
+++ b/internal/action/edit.go
@@ -80,7 +80,7 @@ func Edit(cfg *config.Config, w http.ResponseWriter, r *http.Request, params *Pa
 	title, normalized, _, rendered := format.Apply(cfg, params.DbName, filtered)
 
 	if previewed && save != "" {
-		if err := data.Save(params.DbName, normalized, revisionID); err != nil {
+		if err := data.Save(cfg, params.DbName, normalized, revisionID); err != nil {
 			http.Error(w, "Failed to save", http.StatusInternalServerError)
 			return
 		}
diff --git a/internal/action/image.go b/internal/action/image.go
index a4404ac..e4b4e4d 100644
--- a/internal/action/image.go
+++ b/internal/action/image.go
@@ -78,7 +78,7 @@ func Upload(cfg *config.Config, w http.ResponseWriter, r *http.Request, params *
 			return
 		}
 
-		if err := data.SaveImage(name, filtered); err != nil {
+		if err := data.SaveImage(cfg, name, filtered); err != nil {
 			http.Error(w, "Failed to save", http.StatusInternalServerError)
 			return
 		}
diff --git a/internal/config/config.go b/internal/config/config.go
index 2c20406..8a0b9e3 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -22,6 +22,12 @@ type Config struct {
 		SSLMode  string `yaml:"sslmode"`
 	} `yaml:"database"`
 
+	Vacuum struct {
+		CheckEvery int `yaml:"check-every"`
+		Threshold int64 `yaml:"threshold"`
+		ImageThreshold int64 `yaml:"image-threshold"`
+	} `yaml:"vacuum"`
+
 	Site struct {
 		Base string `yaml:"base"`
 		Name string `yaml:"name"`
diff --git a/internal/data/data.go b/internal/data/data.go
index 26164cd..9b92978 100644
--- a/internal/data/data.go
+++ b/internal/data/data.go
@@ -199,7 +199,7 @@ func diff(oldText, newText string) string {
 	return text
 }
 
-func Save(name, content string, baseRevID int) error {
+func Save(cfg *config.Config, name, content string, baseRevID int) error {
 	ctx := context.Background()
 	tx, err := db.Begin(ctx)
 	if err != nil {
@@ -240,16 +240,68 @@ func Save(name, content string, baseRevID int) error {
 		return err
 	}
 
-	_, err = tx.Exec(ctx,
-		`UPDATE state
-		 SET page_counter = page_counter + 1
-		 WHERE id = 1`,
-		)
+	var pageCount int64
+	err = tx.QueryRow(ctx, `
+		UPDATE state
+		SET page_counter = page_counter + 1
+		WHERE id = 1
+		RETURNING page_counter
+	`).Scan(&pageCount)
 	if err != nil {
 		return err
 	}
 
-	return tx.Commit(ctx)
+	err = tx.Commit(ctx)
+	if err != nil {
+		return err
+	}
+
+	if pageCount % int64(cfg.Vacuum.CheckEvery) == 0 {
+		var sizeBytes int64
+		err = db.QueryRow(ctx, `
+			SELECT pg_total_relation_size('pages') +
+			       pg_total_relation_size('revisions')
+		`).Scan(&sizeBytes)
+		if err != nil {
+			return err
+		}
+
+		if sizeBytes >= cfg.Vacuum.Threshold {
+			_, err = db.Exec(ctx, "VACUUM FULL pages")
+			if err != nil {
+				return err
+			}
+
+			_, err = db.Exec(ctx, `
+				WITH cutoff AS (
+					SELECT COUNT(*) / 2 AS limit_count
+					FROM revisions
+					GROUP BY name
+					ORDER BY COUNT(*) DESC
+					LIMIT 1
+				)
+				DELETE FROM revisions r
+				USING cutoff
+				WHERE r.id IN (
+					SELECT id
+					FROM revisions r2, cutoff
+					WHERE r2.name = r.name
+					ORDER BY r2.created_at ASC
+					OFFSET cutoff.limit_count
+				)
+			`)
+			if err != nil {
+				return err
+			}
+
+			_, err = db.Exec(ctx, "VACUUM FULL revisions")
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
 }
 
 func LoadAll(page int, perPage int) ([]string, error) {
diff --git a/internal/data/image.go b/internal/data/image.go
index bf02371..cd3cb3c 100644
--- a/internal/data/image.go
+++ b/internal/data/image.go
@@ -2,6 +2,8 @@ package data
 
 import (
 	"context"
+
+	"github.com/akikareha/himewiki/internal/config"
 )
 
 func LoadImage(name string) (int, []byte, error) {
@@ -17,7 +19,7 @@ func LoadImage(name string) (int, []byte, error) {
 	return id, content, nil
 }
 
-func SaveImage(name string, content []byte) error {
+func SaveImage(cfg *config.Config, name string, content []byte) error {
 	ctx := context.Background()
 	tx, err := db.Begin(ctx)
 	if err != nil {
@@ -47,14 +49,66 @@ func SaveImage(name string, content []byte) error {
 		return err
 	}
 
-	_, err = tx.Exec(ctx,
-		`UPDATE state
-		 SET image_counter = image_counter + 1
-		 WHERE id = 1`,
-		)
+	var imageCount int64
+	err = tx.QueryRow(ctx, `
+		UPDATE state
+		SET image_counter = image_counter + 1
+		WHERE id = 1
+		RETURNING image_counter
+	`).Scan(&imageCount)
 	if err != nil {
 		return err
 	}
 
-	return tx.Commit(ctx)
+	err = tx.Commit(ctx)
+	if err != nil {
+		return err
+	}
+
+	if imageCount % int64(cfg.Vacuum.CheckEvery) == 0 {
+		var sizeBytes int64
+		err = db.QueryRow(ctx, `
+			SELECT pg_total_relation_size('images') +
+			       pg_total_relation_size('image_revisions')
+		`).Scan(&sizeBytes)
+		if err != nil {
+			return err
+		}
+
+		if sizeBytes >= cfg.Vacuum.ImageThreshold {
+			_, err = db.Exec(ctx, "VACUUM FULL images")
+			if err != nil {
+				return err
+			}
+
+			_, err = db.Exec(ctx, `
+				WITH cutoff AS (
+					SELECT COUNT(*) / 2 AS limit_count
+					FROM image_revisions
+					GROUP BY name
+					ORDER BY COUNT(*) DESC
+					LIMIT 1
+				)
+				DELETE FROM image_revisions r
+				USING cutoff
+				WHERE r.id IN (
+					SELECT id
+					FROM image_revisions r2, cutoff
+					WHERE r2.name = r.name
+					ORDER BY r2.created_at ASC
+					OFFSET cutoff.limit_count
+				)
+			`)
+			if err != nil {
+				return err
+			}
+
+			_, err = db.Exec(ctx, "VACUUM FULL image_revisions")
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
 }