Title: 503 on Sync
Last modified: June 10, 2021

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# 503 on Sync

 *  Resolved [johnjromkyoto](https://wordpress.org/support/users/johnjromkyoto/)
 * (@johnjromkyoto)
 * [5 years, 1 month ago](https://wordpress.org/support/topic/503-on-sync/)
 * Hi,
 * I have a VPS with plesk, Nginx and apache. I use the plugin to import images.
 * When i try to sync a folder with uploaded images through FTP i get a 503 after
   some time even if the server is still running. This folders contains more than
   1500 files.
 * I sync before thousands of images already, never had problem.
 * Any idea how to understand the issue?
 * Thanks
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2F503-on-sync%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [AlanP57](https://wordpress.org/support/users/alanp57/)
 * (@alanp57)
 * [5 years, 1 month ago](https://wordpress.org/support/topic/503-on-sync/#post-14542758)
 * Syncing a folder is very memory intense operation since the plugin has to check
   each files with the list of files already in the current media library folder.
   It may be that you are running out of memory. You can try increasing it adding
   a line like this to your wp-config.php file
 * `define('WP_MAX_MEMORY_LIMIT', '512M');`
 * If an issue is encountered, you can stop the process by closing your browser.
 *  Thread Starter [johnjromkyoto](https://wordpress.org/support/users/johnjromkyoto/)
 * (@johnjromkyoto)
 * [5 years, 1 month ago](https://wordpress.org/support/topic/503-on-sync/#post-14543895)
 * It’s about this, but i had to increase to 4G 🙂
 * Thanks

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘503 on Sync’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [johnjromkyoto](https://wordpress.org/support/users/johnjromkyoto/)
 * Last activity: [5 years, 1 month ago](https://wordpress.org/support/topic/503-on-sync/#post-14543895)
 * Status: resolved