Issue #1848968 by Berdir: Fixed Too many checksum tag queries executed by the cache backend.

core/lib/Drupal/Core/Cache/DatabaseBackend.php

@@ -272,6 +272,7 @@ protected function checksumTags($tags) {
         $query_tags[] = $tag;
       }
    }
+
     if ($query_tags) {
       try {
         if ($db_tags = Database::getConnection()->query('SELECT tag, invalidations FROM {cache_tags} WHERE tag IN (:tags)', array(':tags' => $query_tags))->fetchAllKeyed()) {

core/lib/Drupal/Core/Config/CachedStorage.php

@@ -69,7 +69,7 @@ public function read($name) {
     // Read from the storage on a cache miss and cache the data, if any.
     $data = $this->storage->read($name);
     if ($data !== FALSE) {
-      $this->cache->set($name, $data, CacheBackendInterface::CACHE_PERMANENT, array('config' => array($name)));
+      $this->cache->set($name, $data, CacheBackendInterface::CACHE_PERMANENT);
     }
     // If the cache contained bogus data and there is no data in the storage,
     // wipe the cache entry.
@@ -86,7 +86,7 @@ public function write($name, array $data) {
     if ($this->storage->write($name, $data)) {
       // While not all written data is read back, setting the cache instead of
       // just deleting it avoids cache rebuild stampedes.
-      $this->cache->set($name, $data, CacheBackendInterface::CACHE_PERMANENT, array('config' => array($name)));
+      $this->cache->set($name, $data, CacheBackendInterface::CACHE_PERMANENT);
       return TRUE;
     }
     return FALSE;