problem with thumbnail creation #4386

New Issue

OVERLORD · 2026-02-05T08:45:39+03:00

OVERLORD commented

2026-02-05 08:45:39 +03:00

Originally created by @ap2de on GitHub (Jan 4, 2024).

Attempted Debugging

I have read the debugging page

Searched GitHub Issues

I have searched GitHub for the issue.

Describe the Scenario

I am uploading images to bookstack.
With some images I receive errors:

Failed to handle image upload and/or create thumbnails due to system recource limits.

The image is uploaded correcty, but no thumbnails are shown. When I get into the gallery, i recive the error message:
Failed to create gallery thumbnails due to system resource limits.

Whe I try to re- create the thumbnail for an image, I receive the error message:
Failed to create image size variations due to system resource limits.

In tghe php.ini I have the following values:
upload_max_filesize = 1024M
post_max_size = 1024M

As far as i see the file size is not the problem, as the files are much smaller (e.g. 2.2 MB). For me it seems to be more the problem of resolution (5840x4140). But this is only guessing.
Could you advise me wghat setting I need to change in order to avoid this error message?

Thank you

Exact BookStack Version

v23.10.4

Log Content

No response

Hosting Environment

docker using portainer on synology nas.
image: image: lscr.io/linuxserver/bookstack

Originally created by @ap2de on GitHub (Jan 4, 2024). ### Attempted Debugging - [X] I have read the debugging page ### Searched GitHub Issues - [X] I have searched GitHub for the issue. ### Describe the Scenario I am uploading images to bookstack. With some images I receive errors: Failed to handle image upload and/or create thumbnails due to system recource limits. The image is uploaded correcty, but no thumbnails are shown. When I get into the gallery, i recive the error message: Failed to create gallery thumbnails due to system resource limits. Whe I try to re- create the thumbnail for an image, I receive the error message: Failed to create image size variations due to system resource limits. In tghe php.ini I have the following values: upload_max_filesize = 1024M post_max_size = 1024M As far as i see the file size is not the problem, as the files are much smaller (e.g. 2.2 MB). For me it seems to be more the problem of resolution (5840x4140). But this is only guessing. Could you advise me wghat setting I need to change in order to avoid this error message? Thank you ### Exact BookStack Version v23.10.4 ### Log Content _No response_ ### Hosting Environment docker using portainer on synology nas. image: image: lscr.io/linuxserver/bookstack

OVERLORD added the 🐕 Support label 2026-02-05 08:45:39 +03:00

OVERLORD closed this issue

2026-02-05 08:45:41 +03:00

OVERLORD commented

2026-02-05 08:45:46 +03:00

@ssddanbrown commented on GitHub (Jan 4, 2024):

Hi @ap2de,

This will be likely due to hitting the PHP memory limit, which is controlled via a memory_limit PHP option. You can try doubling the default to see if that helps:

memory_limit = 256M

@ssddanbrown commented on GitHub (Jan 4, 2024): Hi @ap2de, This will be likely due to hitting the PHP memory limit, which is controlled via a [memory_limit](https://www.php.net/manual/en/ini.core.php#ini.memory-limit) PHP option. You can try doubling the default to see if that helps: ```ini memory_limit = 256M ```

OVERLORD commented

2026-02-05 08:45:48 +03:00

@ap2de commented on GitHub (Jan 4, 2024):

Hi @ssddanbrown,
thank you, this did the job!

@ap2de commented on GitHub (Jan 4, 2024): Hi @ssddanbrown, thank you, this did the job!

Sign in to join this conversation.

Branches Tags

1 Participants

Notifications

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: starred/BookStack#4386