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Asked: 2026-05-27T18:43:24+00:00

I have a problem with one of my sites: php won’t write the sessions

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I have a problem with one of my sites: php won’t write the sessions any more. The site was working (for a few months already) and this error popped a few days ago:

Warning: Unknown: write failed: No space left on device (28) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/backup/sess) in Unknown on line 0

I have enough space on the server, but I checked out the specific directory and it has a size of 32M. I think the guys who manage my server put a limit on the dir.
Is it ok if I empty the directory and delete all the sessions inside? Or what should I do?

Thanks

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1 Answer

  1. Editorial Team

    Or what should I do?

    Arbitrarily removing files can help in the short term, but might destroy sessions that are currently active, and won’t solve the root problem: the same thing will happen again in a few days or weeks.

    Talk to the guys who manage your server and ask (or tell) them to increase the limit. They should also look into whether the session directory is getting properly garbage collected (ie., whether expired sessions are getting removed).

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