diff --git a/src/db/CapacitorChannel.php b/src/db/CapacitorChannel.php
index 3d103f4..3d656b8 100644
--- a/src/db/CapacitorChannel.php
+++ b/src/db/CapacitorChannel.php
@@ -7,13 +7,16 @@ namespace nur\sery\db;
 class CapacitorChannel {
   const NAME = null;
 
+  const EACH_COMMIT_THRESHOLD = 100;
+
   static function verifix_name(?string $name): string {
     if ($name === null) $name = "default";
     return strtolower($name);
   }
 
-  function __construct(?string $name=null) {
+  function __construct(?string $name=null, ?int $eachCommitThreshold=null) {
     $this->name = self::verifix_name($name ?? static::NAME);
+    $this->eachCommitThreshold = $eachCommitThreshold ?? static::EACH_COMMIT_THRESHOLD;
     $this->created = false;
   }
 
@@ -24,6 +27,17 @@ class CapacitorChannel {
     return $this->name;
   }
 
+  /**
+   * @var ?int nombre maximum de modifications dans une transaction avant un
+   * commit automatique dans {@link Capacitor::each()}. Utiliser null pour
+   * désactiver la fonctionnalité.
+   */
+  protected $eachCommitThreshold;
+
+  function getEachCommitThreshold(): ?int {
+    return $this->eachCommitThreshold;
+  }
+
   function getTableName(): string {
     return $this->name."_channel";
   }
diff --git a/src/db/sqlite/Sqlite.php b/src/db/sqlite/Sqlite.php
index 772adb1..4c3cbc5 100644
--- a/src/db/sqlite/Sqlite.php
+++ b/src/db/sqlite/Sqlite.php
@@ -20,6 +20,7 @@ class Sqlite {
         "file" => $sqlite->file,
         "flags" => $sqlite->flags,
         "encryption_key" => $sqlite->encryptionKey,
+        "allow_wal" => $sqlite->allowWal,
         "config" => $sqlite->config,
         "migrate" => $sqlite->migration,
       ], $params));
@@ -30,19 +31,30 @@ class Sqlite {
     }
   }
 
-  static function config_enableExceptions(self $sqlite) {
+  static function config_enableExceptions(self $sqlite): void {
     $sqlite->db->enableExceptions(true);
   }
 
+  static function config_enableWalIfAllowed(self $sqlite): void {
+    if ($sqlite->isWalAllowed()) {
+      $sqlite->db->exec("PRAGMA journal_mode=WAL");
+    }
+  }
+
+  const ALLOW_WAL = null;
+
   const CONFIG = [
     [self::class, "config_enableExceptions"],
+    [self::class, "config_enableWalIfAllowed"],
   ];
+
   const MIGRATE = null;
 
   const SCHEMA = [
     "file" => ["string", ""],
     "flags" => ["int", SQLITE3_OPEN_READWRITE + SQLITE3_OPEN_CREATE],
     "encryption_key" => ["string", ""],
+    "allow_wal" => ["?bool"],
     "config" => ["?array|callable"],
     "migrate" => ["?array|string|callable"],
     "auto_open" => ["bool", true],
@@ -51,21 +63,25 @@ class Sqlite {
   function __construct(?string $file=null, ?array $params=null) {
     if ($file !== null) $params["file"] = $file;
     ##schéma
-    $default_file = self::SCHEMA["file"][1];
-    $this->file = strval($params["file"] ?? $default_file);
+    $defaultFile = self::SCHEMA["file"][1];
+    $this->file = $file = strval($params["file"] ?? $defaultFile);
+    $inMemory = $file === ":memory:";
     #
-    $default_flags = self::SCHEMA["flags"][1];
-    $this->flags = intval($params["flags"] ?? $default_flags);
+    $defaultFlags = self::SCHEMA["flags"][1];
+    $this->flags = intval($params["flags"] ?? $defaultFlags);
     #
-    $default_encryptionKey = self::SCHEMA["encryption_key"][1];
-    $this->encryptionKey = strval($params["encryption_key"] ?? $default_encryptionKey);
+    $defaultEncryptionKey = self::SCHEMA["encryption_key"][1];
+    $this->encryptionKey = strval($params["encryption_key"] ?? $defaultEncryptionKey);
+    #
+    $defaultAllowWal = static::ALLOW_WAL ?? !$inMemory;
+    $this->allowWal = $params["allow_wal"] ?? $defaultAllowWal;
     # configuration
     $this->config = $params["config"] ?? static::CONFIG;
     # migrations
     $this->migration = $params["migrate"] ?? static::MIGRATE;
     #
-    $default_autoOpen = self::SCHEMA["auto_open"][1];
-    if ($params["auto_open"] ?? $default_autoOpen) {
+    $defaultAutoOpen = self::SCHEMA["auto_open"][1];
+    if ($params["auto_open"] ?? $defaultAutoOpen) {
       $this->open();
     }
   }
@@ -79,6 +95,14 @@ class Sqlite {
   /** @var string */
   protected $encryptionKey;
 
+  /** @var bool */
+  protected $allowWal;
+
+  /** vérifier s'il est autorisé de configurer le mode WAL */
+  function isWalAllowed(): bool {
+    return $this->allowWal;
+  }
+
   /** @var array|string|callable */
   protected $config;
 
diff --git a/src/db/sqlite/SqliteCapacitor.php b/src/db/sqlite/SqliteCapacitor.php
index 8246397..784eb6b 100644
--- a/src/db/sqlite/SqliteCapacitor.php
+++ b/src/db/sqlite/SqliteCapacitor.php
@@ -196,6 +196,7 @@ class SqliteCapacitor extends CapacitorStorage {
     $commited = false;
     $count = 0;
     $sqlite->beginTransaction();
+    $commitThreshold = $channel->getEachCommitThreshold();
     try {
       $rows = $sqlite->all([
         "select",
@@ -216,6 +217,13 @@ class SqliteCapacitor extends CapacitorStorage {
             "values" => $updates,
             "where" => ["_id" => $row["_id"]],
           ]);
+          if ($commitThreshold !== null) {
+            $commitThreshold--;
+            if ($commitThreshold == 0) {
+              $sqlite->commit();
+              $commitThreshold = $channel->getEachCommitThreshold();
+            }
+          }
         }
         $count++;
       }