# Stop scans on external storage, or: how to disable / delete a background job **URL:** \ **Category:** ℹ️ Support\ **Tags:** nc17\ **Created:** [December 4, 2019, 11:36am UTC](https://help.nextcloud.com/t/stop-scans-on-external-storage-or-how-to-disable-delete-a-background-job/65566 "2019-12-04T11:36:39Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![smeijer](https://help.nextcloud.com/user_avatar/help.nextcloud.com/smeijer/32/18222_2.png) [@smeijer](https://help.nextcloud.com/u/smeijer)\ **Post date:** [December 4, 2019, 11:36am UTC](https://help.nextcloud.com/t/stop-scans-on-external-storage-or-how-to-disable-delete-a-background-job/65566/1 "2019-12-04T11:36:39Z")
Hi, I have connected several shares via external storage (via SMB). I just want to be able to browse these shares from Nextcloud. Nextcloud itself does not really need to be aware of the files residing in these shares (they contain a very large number of small files from snapshots etc). Every once in a while I notice, that for these shares a scan is done, which is taking hours and hours. The performance of my Nextcloud instance suffers from it. I guess these scans are coming from a scheduled job. I checked for the jobs currently scheduled and targeted “OCA\Files\BackgroundJob\ScanFiles” as the most likely candidate triggering the scan. ``` "OCA\Activity\BackgroundJob\EmailNotification" "OCA\Activity\BackgroundJob\ExpireActivities" "OCA\AdminAudit\BackgroundJobs\Rotate" "OCA\Bookmarks\BackgroundJobs\PreviewsJob" "OCA\Cospend\Cron\AutoExport" "OCA\Cospend\Cron\RepeatBills" "OCA\DAV\BackgroundJob\CleanupDirectLinksJob" "OCA\DAV\BackgroundJob\CleanupInvitationTokenJob" "OCA\DAV\BackgroundJob\EventReminderJob" "OCA\DAV\BackgroundJob\RefreshWebcalJob" "OCA\DAV\BackgroundJob\UpdateCalendarResourcesRoomsBackgroundJob" "OCA\Deck\Cron\CardDescriptionActivity" "OCA\Deck\Cron\DeleteCron" "OCA\Deck\Cron\ScheduledNotifications" "OCA\Federation\SyncJob" "OCA\Files_Antivirus\BackgroundJob\BackgroundScanner" "OCA\Files\BackgroundJob\CleanupFileLocks" "OCA\Files\BackgroundJob\DeleteOrphanedItems" "OCA\Files\BackgroundJob\ScanFiles" "OCA\Files_Sharing\BackgroundJob\FederatedSharesDiscoverJob" "OCA\Files_Sharing\DeleteOrphanedSharesJob" "OCA\Files_Sharing\ExpireSharesJob" "OCA\Files_Trashbin\BackgroundJob\ExpireTrash" "OCA\Files_Versions\BackgroundJob\ExpireVersions" "OCA\FullTextSearch\Cron\Index" "OCA\GroupFolders\BackgroundJob\ExpireGroupVersions" "OCA\NextcloudAnnouncements\Cron\Crawler" "OCA\PhoneTrack\Cron\AutoExport" "OCA\QuotaWarning\Job\User" "OCA\RansomwareDetection\BackgroundJob\CleanUpJob" "OCA\Richdocuments\Backgroundjobs\ObtainCapabilities" "OCA\Spreed\BackgroundJob\ExpireSignalingMessage" "OCA\Spreed\BackgroundJob\RemoveEmptyRooms" "OCA\Support\BackgroundJobs\CheckSubscription" "OCA\SuspiciousLogin\BackgroundJob\ETLJob" "OCA\SuspiciousLogin\BackgroundJob\TrainJobIpV4" "OCA\SuspiciousLogin\BackgroundJob\TrainJobIpV6" "OCA\Text\Cron\Cleanup" "OCA\TwoFactorBackupCodes\BackgroundJob\RememberBackupCodesJob" "OCA\UpdateNotification\Notification\BackgroundJob" "OCA\UpdateNotification\ResetTokenBackgroundJob" "OC\Authentication\Token\DefaultTokenCleanupJob" "OC\BackgroundJob\Legacy\RegularJob" "OC\Core\BackgroundJobs\CleanupLoginFlowV2" "OC\Log\Rotate" "OC\Preview\BackgroundCleanupJob" ``` I searched the forum and found several posts regarding performance of these scan jobs. However, none of them answered the question that I have, which is: how can I stop these scans from starting in the first place. Can I just DELETE the entry from oc\_jobs? Would there be any other consequence from deleting this job (or will really only these scans on the external shares be disabled)? What would I need to do when I do want these scans to be scheduled again? Can I just INSERT the entry back in? Thanks a lot for your advice! Cheers. ---
**Author:** ![anmolnar](https://help.nextcloud.com/letter_avatar/anmolnar/32/6_22734026db12803ebb3e059622ac3534.png) [@anmolnar](https://help.nextcloud.com/u/anmolnar)\ **Post date:** [December 16, 2019, 9:38am UTC](https://help.nextcloud.com/t/stop-scans-on-external-storage-or-how-to-disable-delete-a-background-job/65566/2 "2019-12-16T09:38:55Z")
I’m interested in this one too. I use Amazon S3 as external storage and scanning the files every time the cron job is running generates AWS cost with no particular reason. I think it would be desirable to disable files scanning on external storages rather than deleting the job entirely. ---
**Author:** ![h3rb3rt](https://help.nextcloud.com/user_avatar/help.nextcloud.com/h3rb3rt/32/9824_2.png) [@h3rb3rt](https://help.nextcloud.com/u/h3rb3rt)\ **Post date:** [October 20, 2020, 8:57am UTC](https://help.nextcloud.com/t/stop-scans-on-external-storage-or-how-to-disable-delete-a-background-job/65566/3 "2020-10-20T08:57:41Z")
I jump onto this too. I have disabled my External Storages completely but for whatever reason this job is still running and scans whatever. It takes forever and eats up resources for nothing. I do not get the idea of this job if every file action is handled via nextcloud interfaces/apis anyhow. I am running on NC19 right now ---
**Author:** ![christianpoortvliet](https://help.nextcloud.com/letter_avatar/christianpoortvliet/32/6_22734026db12803ebb3e059622ac3534.png) [@christianpoortvliet](https://help.nextcloud.com/u/christianpoortvliet)\ **Post date:** [December 30, 2020, 10:48am UTC](https://help.nextcloud.com/t/stop-scans-on-external-storage-or-how-to-disable-delete-a-background-job/65566/4 "2020-12-30T10:48:48Z")
same here: SHOW ENGINE INNODB STATUS; ``` mysql tables in use 1, locked 1 10778 lock struct(s), heap size 975056, 1 row lock(s), undo log entries 1 MySQL thread id 2, OS thread handle 140563961583360, query id 115 localhost oc_ncadmin updating DELETE FROM `oc_jobs` WHERE (`class` = 'OCA\\LookupServerConnector\\BackgroundJobs\\RetryJob') AND (`argument` = '{\"dataArray\":{\"message\":{\"data\":{\"federationId\":\"339AE28C-4A94-4E49-8DDF-0AE9C6474F3D@ **Author:** ![christianpoortvliet](https://help.nextcloud.com/letter_avatar/christianpoortvliet/32/6_22734026db12803ebb3e059622ac3534.png) [@christianpoortvliet](https://help.nextcloud.com/u/christianpoortvliet)\ **Post date:** [December 30, 2020, 11:02am UTC](https://help.nextcloud.com/t/stop-scans-on-external-storage-or-how-to-disable-delete-a-background-job/65566/5 "2020-12-30T11:02:07Z") mysql\> DELETE FROM oc\_jobs; ERROR 2006 (HY000): MySQL server has gone away No connection. Trying to reconnect… Connection id: 2 Current database: ncdb Query OK, 257192 rows affected (24.69 sec) sorted, now cron takes 2 seconds. ---
**Author:** ![h3rb3rt](https://help.nextcloud.com/user_avatar/help.nextcloud.com/h3rb3rt/32/9824_2.png) [@h3rb3rt](https://help.nextcloud.com/u/h3rb3rt)\ **Post date:** [January 14, 2021, 7:03am UTC](https://help.nextcloud.com/t/stop-scans-on-external-storage-or-how-to-disable-delete-a-background-job/65566/6 "2021-01-14T07:03:15Z")
not a good idea, I am sure > [@Cron.php takes too long and can end up running multiple times](https://help.nextcloud.com/t/cron-php-takes-too-long-and-can-end-up-running-multiple-times/85024/12): > > @christianpoortvliet I am not sure deleting the whole oc\_jobs content is a good solution. Especially because the jobs table is used to run recurring jobs which are not directly handled by the linux cron daemon. For now, as far as I understand the bug ticket, the preview-generator app could have something to do with all of it. ---
**Author:** ![wwe](https://help.nextcloud.com/user_avatar/help.nextcloud.com/wwe/32/72963_2.png) [@wwe](https://help.nextcloud.com/u/wwe)\ **Post date:** [December 4, 2024, 12:22pm UTC](https://help.nextcloud.com/t/stop-scans-on-external-storage-or-how-to-disable-delete-a-background-job/65566/7 "2024-12-04T12:22:36Z")
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**Author:** ![wwe](https://help.nextcloud.com/user_avatar/help.nextcloud.com/wwe/32/72963_2.png) [@wwe](https://help.nextcloud.com/u/wwe)\ **Post date:** [December 11, 2024, 4:05pm UTC](https://help.nextcloud.com/t/stop-scans-on-external-storage-or-how-to-disable-delete-a-background-job/65566/8 "2024-12-11T16:05:36Z")