The trackItemInsert method can't handle large amount of items.

Hello.

I have an entity type with around 315000 items in it, which i need to index with ApacheSolr. But when i try to create an search_api index for it i get the WSOD. After page refresh the index is exist but i have 0 items to index.

I found out that the SearchApiAbstractDataSourceController->trackItemInsert() method can't hadle all 315000 items in one array. So, i suggest it should be chunked into smaller pieces.

diff --git a/sites/all/modules/search_api/includes/datasource.inc b/sites/all/modules/search_api/includes/datasource.inc
old mode 100644
new mode 100755
index 684a694..9b8166a
--- a/sites/all/modules/search_api/includes/datasource.inc
+++ b/sites/all/modules/search_api/includes/datasource.inc
@@ -475,19 +475,22 @@ abstract class SearchApiAbstractDataSourceController implements SearchApiDataSou
     if (!$this->table) {
       return;
     }
-    $insert = db_insert($this->table)
-      ->fields(array($this->itemIdColumn, $this->indexIdColumn, $this->changedColumn));
-    foreach ($item_ids as $item_id) {
-      foreach ($indexes as $index) {
-        $this->checkIndex($index);
-        $insert->values(array(
-          $this->itemIdColumn => $item_id,
-          $this->indexIdColumn => $index->id,
-          $this->changedColumn => 1,
-        ));
+
+    foreach (array_chunk($item_ids, 1000) as $chunk) {
+      $insert = db_insert($this->table)
+        ->fields(array($this->itemIdColumn, $this->indexIdColumn, $this->changedColumn));
+      foreach ($chunk as $item_id) {
+        foreach ($indexes as $index) {
+          $this->checkIndex($index);
+          $insert->values(array(
+            $this->itemIdColumn => $item_id,
+            $this->indexIdColumn => $index->id,
+            $this->changedColumn => 1,
+          ));
+        }
       }
+      $insert->execute();
     }
-    $insert->execute();
   }
 
   /**