diff --git a/src/apps.js b/src/apps.js
index ea03b0e02..019bf8f52 100644
--- a/src/apps.js
+++ b/src/apps.js
@@ -604,20 +604,31 @@ function scheduleTask(appId, installationState, taskId, callback) {
     assert.strictEqual(typeof taskId, 'string');
     assert.strictEqual(typeof callback, 'function');
 
-    appTaskManager.scheduleTask(appId, taskId, function (error) {
-        debug(`scheduleTask: task ${taskId} of ${appId} completed`);
-        if (error && (error.code === tasks.ECRASHED || error.code === tasks.ESTOPPED)) { // if task crashed, update the error
-            debug(`Apptask crashed/stopped: ${error.message}`);
-            let boxError = new BoxError(BoxError.TASK_ERROR, error.message);
-            boxError.details.crashed = error.code === tasks.ECRASHED;
-            boxError.details.stopped = error.code === tasks.ESTOPPED;
-            // see also apptask makeTaskError
-            boxError.details.taskId = taskId;
-            boxError.details.installationState = installationState;
-            appdb.update(appId, { installationState: exports.ISTATE_ERROR, error: boxError.toPlainObject(), taskId: null }, callback);
-        } else if (!(installationState === exports.ISTATE_PENDING_UNINSTALL && !error)) { // clear out taskId except for successful uninstall
-            appdb.update(appId, { taskId: null }, callback);
+    settings.getBackupConfig(function (error, backupConfig) {
+        if (error) return callback(error);
+
+        let memoryLimit = 400;
+        if (installationState === exports.ISTATE_PENDING_BACKUP || installationState === exports.ISTATE_PENDING_CLONE || installationState === exports.ISTATE_PENDING_RESTORE) {
+            memoryLimit = 'memoryLimit' in backupConfig ? Math.max(backupConfig.memoryLimit/1024/1024, 400) : 400;
         }
+
+        const options = { timeout: 20 * 60 * 60 * 1000 /* 20 hours */, nice: 15, memoryLimit };
+
+        appTaskManager.scheduleTask(appId, taskId, options, function (error) {
+            debug(`scheduleTask: task ${taskId} of ${appId} completed`);
+            if (error && (error.code === tasks.ECRASHED || error.code === tasks.ESTOPPED)) { // if task crashed, update the error
+                debug(`Apptask crashed/stopped: ${error.message}`);
+                let boxError = new BoxError(BoxError.TASK_ERROR, error.message);
+                boxError.details.crashed = error.code === tasks.ECRASHED;
+                boxError.details.stopped = error.code === tasks.ESTOPPED;
+                // see also apptask makeTaskError
+                boxError.details.taskId = taskId;
+                boxError.details.installationState = installationState;
+                appdb.update(appId, { installationState: exports.ISTATE_ERROR, error: boxError.toPlainObject(), taskId: null }, callback);
+            } else if (!(installationState === exports.ISTATE_PENDING_UNINSTALL && !error)) { // clear out taskId except for successful uninstall
+                appdb.update(appId, { taskId: null }, callback);
+            }
+        });
     });
 }
 
diff --git a/src/apptaskmanager.js b/src/apptaskmanager.js
index bfbe3c5a1..f6be87394 100644
--- a/src/apptaskmanager.js
+++ b/src/apptaskmanager.js
@@ -37,9 +37,10 @@ function initializeSync() {
 }
 
 // callback is called when task is finished
-function scheduleTask(appId, taskId, callback) {
+function scheduleTask(appId, taskId, options, callback) {
     assert.strictEqual(typeof appId, 'string');
     assert.strictEqual(typeof taskId, 'string');
+    assert.strictEqual(typeof options, 'object');
     assert.strictEqual(typeof callback, 'function');
 
     if (!gInitialized) initializeSync();
@@ -72,8 +73,7 @@ function scheduleTask(appId, taskId, callback) {
 
     scheduler.suspendJobs(appId);
 
-    // TODO: set memory limit for app backup task
-    tasks.startTask(taskId, { logFile, timeout: 20 * 60 * 60 * 1000 /* 20 hours */, nice: 15 }, function (error, result) {
+    tasks.startTask(taskId, Object.assign(options, { logFile }), function (error, result) {
         callback(error, result);
 
         delete gActiveTasks[appId];