Menu deletion causes massive memory loss

  • Hi,
    I’ve been landed with looking after a site that my organization recently took delivery of from a 3rd party developer, which currently runs under WP 4.9.10. It seems to leak memory, and a specific incident occurred when an administrator deleted some submenus by navigating via the dashboard as Appearance -> Menus. The act of deleting two sub menus caused the memory usage (according to Zabbix) to shoot up by 6GB, and the Apache log displayed a massive number of entries of the form:

    10.26.0.253 – – [07/May/2019:15:43:17 +0100] “POST /wp-admin/admin-ajax.php HTTP/2.0” 200 46
    10.26.0.253 – – [07/May/2019:15:43:17 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 200 –
    10.26.0.253 – – [07/May/2019:15:43:18 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 200 –
    10.26.0.253 – – [07/May/2019:15:43:29 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 500 –
    10.26.0.253 – – [07/May/2019:15:43:29 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 500 –
    10.26.0.253 – – [07/May/2019:15:43:29 +0100] “GET /sitemap.xml HTTP/1.1” 500 251
    10.26.0.253 – – [07/May/2019:15:43:29 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 500 –
    10.26.0.253 – – [07/May/2019:15:43:29 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 500 –
    10.26.0.253 – – [07/May/2019:15:43:29 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 500 –
    10.26.0.253 – – [07/May/2019:15:43:29 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 500 –
    10.26.0.253 – – [07/May/2019:15:43:29 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 500 –
    10.26.0.253 – – [07/May/2019:15:43:20 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 200 –
    10.26.0.253 – – [07/May/2019:15:43:29 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 500 –
    10.26.0.253 – – [07/May/2019:15:43:29 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 500 –
    10.26.0.253 – – [07/May/2019:15:43:29 +0100] “POST /wp-admin/nav-menus.php HTTP/2.0” 500 –
    … lots more deleted …

    The allowed memory per PHP process is set as 128MB, and we’re running PHP 7.2.12. I’d be grateful for any useful pointers of how to start to debug the issue, unless anyone has an idea of what the specific problem may be.

    Thx.

Viewing 1 replies (of 1 total)

  • The act of deleting two sub menus caused the memory usage (according to Zabbix) to shoot up by 6GB

    Just deleting a menu should not cause that. Can you disable all themes/plugins, delete a menu again and check if the problem still persists.

Viewing 1 replies (of 1 total)
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