{"id":9377,"date":"2022-05-13T23:56:02","date_gmt":"2022-05-13T21:56:02","guid":{"rendered":"https:\/\/monodes.com\/predaelli\/?p=9377"},"modified":"2022-05-13T23:56:02","modified_gmt":"2022-05-13T21:56:02","slug":"increase-open-files-limit-solution-for-too-many-open-files-24","status":"publish","type":"post","link":"https:\/\/monodes.com\/predaelli\/2022\/05\/13\/increase-open-files-limit-solution-for-too-many-open-files-24\/","title":{"rendered":"Increase “Open Files Limit”. Solution for “Too many open files (24)”"},"content":{"rendered":"

Increase “Open Files Limit”. Solution for “Too many open files (24)”<\/a><\/em><\/p>\n

<\/p>\n

If you are getting error \u201cToo many open files (24)\u201d then your application\/command\/script is hitting max open file limit allowed by linux. You need to increase open file limit as below:<\/p>\n

Increase limit<\/h2>\n

Per-User Limit<\/h3>\n

Open file:\u00a0\/etc\/security\/limits.conf<\/code><\/p>\n

Paste following towards end:<\/p>\n

*         hard    nofile      500000\n*         soft    nofile      500000\nroot      hard    nofile      500000\nroot      soft    nofile      500000<\/pre>\n
500000 is fair number. I am not sure what is max limit but 999999 (Six-9) worked for me once as far as I remember.<\/p>\n
Once you save file, you may need to logout and login again.<\/p>\n
pam-limits<\/h4>\n
I read at many places that an extra step is neede for limit to change for daemon processes. I did not need following yet, but if above changes are not working for you, you may give this a try.<\/p>\n
Open\u00a0\/etc\/pam.d\/common-session<\/code><\/p>\n
Add following line:<\/p>\n
session required pam_limits.so<\/pre>\n
System-Wide Limit<\/h3>\n
Set this higher than user-limit set above.<\/p>\n
Open\u00a0\/etc\/sysctl.conf\u00a0<\/code><\/p>\n
Add following:<\/p>\n
fs.file-max = 2097152<\/pre>\n
Run:<\/p>\n
sysctl -p<\/pre>\n
Above will increase \u201ctotal\u201d number of files that can remain open system-wide.<\/p>\n
Verify New Limits<\/h2>\n
Use following command to see max limit of file descriptors:<\/p>\n
cat \/proc\/sys\/fs\/file-max<\/pre>\n
Hard Limit<\/p>\n
ulimit -Hn<\/pre>\n
Soft Limit<\/p>\n
ulimit -Sn<\/pre>\n
if you are logged in as root:<\/p>\n
Check limit for other user<\/h3>\n
Just replace www-data<\/code>\u00a0by linux username you wish to check limits for:<\/p>\n
su - www-data -c 'ulimit -aHS' -s '\/bin\/bash'<\/pre>\n
Check limits of a running process:<\/h3>\n
Find process-id (PID):<\/p>\n
ps aux | grep process-name<\/pre>\n
Suppose, XXX is PID, then run following commands to check limits:<\/p>\n
cat \/proc\/XXX\/limits<\/pre>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"
Increase “Open Files Limit”. Solution for “Too many open files (24)”<\/p>\n
Read more →<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":4,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"","footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[72,278],"tags":[],"class_list":["post-9377","post","type-post","status-publish","format-standard","hentry","category-documentations","category-tricks"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p6daft-2rf","jetpack-related-posts":[{"id":14800,"url":"https:\/\/monodes.com\/predaelli\/2026\/01\/24\/ventoy-a-new-bootable-usb-solution\/","url_meta":{"origin":9377,"position":0},"title":"Ventoy A New Bootable USB Solution","author":"Paolo Redaelli","date":"2026-01-24","format":false,"excerpt":"Ventoy A New Bootable USB Solution Ventoy is an open source tool to create bootable USB drive for ISO\/WIM\/IMG\/VHD(x)\/EFI files.With Ventoy, you don't need to format the disk over and over, you just need to copy the ISO\/WIM\/IMG\/VHD(x)\/EFI files to the USB drive and boot them directly.You can copy many\u2026","rel":"","context":"In "Software"","block_context":{"text":"Software","link":"https:\/\/monodes.com\/predaelli\/category\/software\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/monodes.com\/predaelli\/wp-content\/uploads\/sites\/4\/2026\/01\/ventoy.webp?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":12892,"url":"https:\/\/monodes.com\/predaelli\/2025\/03\/06\/how-to-download-all-pdf-files-linked-from-a-single-page-using-wget\/","url_meta":{"origin":9377,"position":1},"title":"How to download all PDF files linked from a single page using wget","author":"Paolo Redaelli","date":"2025-03-06","format":false,"excerpt":"You can use wget to download all PDFs from a webpage by using: wget -r -l1 -H -t1 -nd -N -np -A.pdf -erobots=off --wait=2 --random-wait --limit-rate=20k [URL] -r: Recursive download. -l1: Only one level deep (i.e., only files directly linked from this page). -H: Span hosts (follow links to other\u2026","rel":"","context":"In "Tricks"","block_context":{"text":"Tricks","link":"https:\/\/monodes.com\/predaelli\/category\/documentations\/tricks\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":11998,"url":"https:\/\/monodes.com\/predaelli\/2024\/10\/18\/open-indd-files-without-indesign\/","url_meta":{"origin":9377,"position":2},"title":"Open INDD files without InDesign","author":"Paolo Redaelli","date":"2024-10-18","format":false,"excerpt":"Open Photopea.com, press File - Open, and select any INDD file Source: Open INDD files without InDesign","rel":"","context":"In "Senza categoria"","block_context":{"text":"Senza categoria","link":"https:\/\/monodes.com\/predaelli\/category\/senza-categoria\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":3200,"url":"https:\/\/monodes.com\/predaelli\/2017\/07\/03\/already\/","url_meta":{"origin":9377,"position":3},"title":"Already?","author":"Paolo Redaelli","date":"2017-07-03","format":false,"excerpt":"I have overestimated the capabilities of my Inforce 6410. 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