protected function collectGarbage()
 {
     $cache = new PhabricatorKeyValueDatabaseCache();
     $conn_w = $cache->establishConnection('w');
     queryfx($conn_w, 'DELETE FROM %T WHERE cacheCreated < %d
     ORDER BY cacheCreated ASC LIMIT 100', $cache->getTableName(), $this->getGarbageEpoch());
     return $conn_w->getAffectedRows() == 100;
 }
 protected function collectGarbage()
 {
     $cache = new PhabricatorKeyValueDatabaseCache();
     $conn_w = $cache->establishConnection('w');
     queryfx($conn_w, 'DELETE FROM %T WHERE cacheExpires < %d
     ORDER BY cacheExpires ASC LIMIT 100', $cache->getTableName(), PhabricatorTime::getNow());
     return $conn_w->getAffectedRows() == 100;
 }
 public function collectGarbage()
 {
     $key = 'gcdaemon.ttl.general-cache';
     $ttl = PhabricatorEnv::getEnvConfig($key);
     if ($ttl <= 0) {
         return false;
     }
     $cache = new PhabricatorKeyValueDatabaseCache();
     $conn_w = $cache->establishConnection('w');
     queryfx($conn_w, 'DELETE FROM %T WHERE cacheCreated < %d
     ORDER BY cacheCreated ASC LIMIT 100', $cache->getTableName(), time() - $ttl);
     return $conn_w->getAffectedRows() == 100;
 }