When I run the script I observed that it manages to table rows, but not files.
Start command line script maintenance/flushUtterances.php [localisation] LocalisationCache using store LCStoreCDB [session] SessionManager using store RedisBagOStuff [DBQuery] Wikimedia\Rdbms\DatabaseMysqlBase::open [0s] 127.0.0.1: SET group_concat_max_len = 262144, sql_mode = '' [DBReplication] Wikimedia\Rdbms\LBFactory::getChronologyProtector: request info { "IPAddress": "127.0.0.1", "UserAgent": false, "ChronologyProtection": false, "ChronologyPositionIndex": 0, "ChronologyClientId": false } [DBConnection] Wikimedia\Rdbms\LoadBalancer::lazyLoadReplicationPositions: executed chronology callback. [DBConnection] Wikimedia\Rdbms\LoadBalancer::getLocalConnection: opened new connection for 0 [DBQuery] Wikimedia\Rdbms\DatabaseMysqlBase::serverIsReadOnly [0s] 127.0.0.1: SELECT @@GLOBAL.read_only AS Value [DBQuery] Wikimedia\Rdbms\Database::select [0.008s] 127.0.0.1: SELECT wsu_utterance_id FROM `wikispeech_utterance` WHERE wsu_lang = 'en' [DBQuery] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances [0.001s] 127.0.0.1: DELETE FROM `wikispeech_utterance` WHERE wsu_utterance_id = '50' [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances: Flushed out utterance with id 50 from database [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::getFileBackend: No file backend defined in LocalSettings.php. Falling back on FS storage backend named wikispeech-backend in /srv/images/wikispeech_utterances. [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete audio file for utterance with identity 50. [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete synthesis metadata file for utterance with identity 50. [DBQuery] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances [0.02s] 127.0.0.1: DELETE FROM `wikispeech_utterance` WHERE wsu_utterance_id = '51' [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances: Flushed out utterance with id 51 from database [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete audio file for utterance with identity 51. [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete synthesis metadata file for utterance with identity 51. [DBQuery] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances [0.003s] 127.0.0.1: DELETE FROM `wikispeech_utterance` WHERE wsu_utterance_id = '52' [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances: Flushed out utterance with id 52 from database [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete audio file for utterance with identity 52. [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete synthesis metadata file for utterance with identity 52. [DBQuery] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances [0.002s] 127.0.0.1: DELETE FROM `wikispeech_utterance` WHERE wsu_utterance_id = '53' [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances: Flushed out utterance with id 53 from database [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete audio file for utterance with identity 53. [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete synthesis metadata file for utterance with identity 53. [DBQuery] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances [0.002s] 127.0.0.1: DELETE FROM `wikispeech_utterance` WHERE wsu_utterance_id = '54' [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances: Flushed out utterance with id 54 from database [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete audio file for utterance with identity 54. [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete synthesis metadata file for utterance with identity 54. [DBQuery] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances [0.002s] 127.0.0.1: DELETE FROM `wikispeech_utterance` WHERE wsu_utterance_id = '55' [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances: Flushed out utterance with id 55 from database [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete audio file for utterance with identity 55. [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete synthesis metadata file for utterance with identity 55. [DBQuery] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances [0.004s] 127.0.0.1: DELETE FROM `wikispeech_utterance` WHERE wsu_utterance_id = '56' [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::flushUtterances: Flushed out utterance with id 56 from database [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete audio file for utterance with identity 56. [Wikispeech] MediaWiki\Wikispeech\Utterance\UtteranceStore::deleteFileBackendFile: Unable to delete synthesis metadata file for utterance with identity 56. [DBConnection] Wikimedia\Rdbms\LBFactory::destroy: closing connection to database '127.0.0.1'.