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Nextcloud: OPcache buffer is nearly full

Nextcloud complains about opcache.interned_strings_buffer and opcache.memory_consumption not being large enough, so this is how to adjust them.


By. Jacob

Edited: 2022-08-10 07:54

There are some warnings regarding your setup.

  • The PHP OPcache module is not properly configured. See the documentation ↗ for more information.

    • The OPcache buffer is nearly full. To assure that all scripts can be hold in cache, it is recommended to apply opcache.memory_consumption to your PHP configuration with a value higher than 128.
    • The OPcache interned strings buffer is nearly full. To assure that repeating strings can be effectively cached, it is recommended to apply opcache.interned_strings_buffer to your PHP configuration with a value higher than 8.

This is not really an error, but rather a warning to inform you that your OPcache resources may be running low, and it could be useful to increase the available resources.

The specific options can typically be adjusted in /etc/php/8.0/fpm/conf.d/10.opcache.conf – if the file does not exist, you can try to create it.

You need to adjust opcache.interned_strings_buffer and opcache.memory_consumption. E.g. Just increase their values for now:


The conf.d directory is for user-configuration options, whereas direct php.ini modifications could be overwritten doing an update.

Note. The exact location may depend on which linux distribution you are using.

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