cosmos
July 22, 2025, 9:46am
1
think as linux administrator
open() “/var/log/nginx/domains/webmail.mydomain.info.log” failed (24: Too many open files)
How to fix this error?
Nginx has nest config now:
cat /proc/$(pidof apache2 | awk ‘{print $1}’)/limits | grep “Max open files”
sudo systemctl show apache2 | grep -i limitnofile
cat /etc/nginx/nginx.conf
# Server globals
user www-data;
worker_processes auto;
worker_rlimit_nofile 65535;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
include /etc/nginx/conf.d/main/*.conf;
include /etc/nginx/modules-enabled/*.conf;
# Worker config
events {
worker_connections 512;
use epoll;
multi_accept on;
}
http {
# Main settings
sendfile on;
tcp_nopush on;
tcp_nodelay on;
client_header_timeout 180s;
client_body_timeout 180s;
client_header_buffer_size 2k;
client_body_buffer_size 256k;
client_max_body_size 1024m;
large_client_header_buffers 4 8k;
send_timeout 60s;
keepalive_timeout 30s;
keepalive_requests 1000;
reset_timedout_connection on;
server_tokens off;
server_name_in_redirect off;
server_names_hash_max_size 512;
server_names_hash_bucket_size 512;
charset utf-8;
# FastCGI settings
fastcgi_buffers 512 4k;
fastcgi_buffer_size 256k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;
fastcgi_connect_timeout 30s;
fastcgi_read_timeout 300s;
fastcgi_send_timeout 180s;
fastcgi_cache_lock on;
fastcgi_cache_lock_timeout 5s;
fastcgi_cache_background_update on;
fastcgi_cache_revalidate on;
# Proxy settings
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header Early-Data $rfc_early_data;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass_header Set-Cookie;
proxy_buffers 256 4k;
proxy_buffer_size 32k;
proxy_busy_buffers_size 32k;
proxy_temp_file_write_size 256k;
proxy_connect_timeout 30s;
proxy_read_timeout 300s;
proxy_send_timeout 180s;
# Log format
log_format main '$remote_addr - $remote_user [$time_local] $request "$status" $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for"';
log_format bytes '$body_bytes_sent';
log_not_found off;
access_log off;
# access_log /var/log/nginx/combined.log;
error_log /var/log/nginx/error.log crit;
# Mime settings
include /etc/nginx/mime.types;
default_type application/octet-stream;
# Compression
gzip on;
gzip_vary on;
gzip_static on;
gzip_comp_level 6;
gzip_min_length 1024;
gzip_buffers 128 4k;
gzip_http_version 1.1;
gzip_types text/css text/javascript text/js text/plain text/richtext text/shtml text/x-component text/x-java-source text/x-markdown text/x-script text/xml image/bmp image/svg+xml image/vnd.microsoft.icon image/x-icon font/otf font/ttf font/x-woff multipart/bag multipart/mixed application/eot application/font application/font-sfnt application/font-woff application/javascript application/javascript-binast application/json application/ld+json application/manifest+json application/opentype application/otf application/rss+xml application/ttf application/truetype application/vnd.api+json application/vnd.ms-fontobject application/wasm application/xhtml+xml application/xml application/xml+rss application/x-httpd-cgi application/x-javascript application/x-opentype application/x-otf application/x-perl application/x-protobuf application/x-ttf;
gzip_proxied any;
# Cloudflare IPs
include /etc/nginx/conf.d/cloudflare.inc;
# SSL PCI compliance
ssl_buffer_size 1369;
ssl_ciphers "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:DHE-RSA-AES256-SHA256";
ssl_dhparam /etc/ssl/dhparam.pem;
ssl_early_data on;
ssl_ecdh_curve auto;
ssl_prefer_server_ciphers on;
ssl_protocols TLSv1.2 TLSv1.3;
ssl_session_cache shared:SSL:20m;
ssl_session_tickets on;
ssl_session_timeout 7d;
resolver 127.0.0.53 valid=300s ipv6=off;
resolver_timeout 5s;
# Error pages
error_page 403 /error/404.html;
error_page 404 /error/404.html;
error_page 410 /error/410.html;
error_page 500 501 502 503 504 505 /error/50x.html;
# Proxy cache
proxy_cache_path /var/cache/nginx levels=2 keys_zone=cache:10m inactive=60m max_size=1024m;
proxy_cache_key "$scheme$request_method$host$request_uri";
proxy_temp_path /var/cache/nginx/temp;
proxy_ignore_headers Cache-Control Expires;
proxy_cache_use_stale error timeout invalid_header updating http_502;
proxy_cache_valid any 1d;
# FastCGI cache
fastcgi_cache_path /var/cache/nginx/micro levels=1:2 keys_zone=microcache:10m inactive=30m max_size=1024m;
fastcgi_cache_key "$scheme$request_method$host$request_uri";
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;
fastcgi_cache_use_stale error timeout invalid_header updating http_500 http_503;
add_header X-FastCGI-Cache $upstream_cache_status;
# Cache bypass
map $http_cookie $no_cache {
default 0;
~SESS 1;
~wordpress_logged_in 1;
}
# File cache (static assets)
open_file_cache max=10000 inactive=30s;
open_file_cache_valid 60s;
open_file_cache_min_uses 2;
open_file_cache_errors off;
# Wildcard include
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/conf.d/domains/*.conf;
}
cosmos
July 22, 2025, 9:47am
2
I suppose that too much error logs files trying to open /var/log/nginx/domains/webmail.mydomain.info.log
nu01
July 22, 2025, 10:47am
3
Open files are limited to 1024. Suggest to set it to a higher limit of say 65535.
Set it for your PHP version (example PHP8.2):
mkdir -p /etc/systemd/system/php8.2-fpm.service.d/
echo -e "[Service]\nLimitNOFILE=65535" > /etc/systemd/system/php8.2-fpm.service.d/override.conf
systemctl daemon-reload
systemctl restart php8.2-fpm.service
Check again that open files limit has been raised:
cat /proc/$(pgrep -f 'master.*php\/8\.2' | head -n1)/limits
cosmos
July 22, 2025, 11:37am
4
well I had tried as your wrote but with no luck
cat /proc/$(pgrep -f ‘master.*php/8.1’ | head -n1)/limits262144 262144 files
The major thing was this limit
ulimit -S -n 66048
but is it permanent solution?
1 Like
nu01
July 22, 2025, 12:12pm
5
cosmos:
ulimit -Sn
Your All-in-One Learning Portal: GeeksforGeeks is a comprehensive educational platform that empowers learners across domains-spanning computer science and programming, school education, upskilling, commerce, software tools, competitive exams, and...
Your All-in-One Learning Portal: GeeksforGeeks is a comprehensive educational platform that empowers learners across domains-spanning computer science and programming, school education, upskilling, commerce, software tools, competitive exams, and...
https://www.baeldung.com/linux/ulimit-tutorial
Set the soft limit as say 65576 with sysctl -w fs.file-max=65576
cosmos
August 8, 2025, 9:48am
6
Sorry, I dont know why but again I should back with the same error
Still cant change 1024 value:
sudo nginx -T
How to increase SOFT LIMIT for Max open files?
cosmos
August 8, 2025, 10:02am
7
:/etc/nginx# cat /proc/$(pgrep -f ‘master.*php/8.1’ | head -n1)/limits | grep “Max open file”
As I see for current php version used on my server 8.1
As root:
systemctl edit nginx.service
This will open the file /etc/systemd/system/nginx.service.d/override.conf so you need to add two lines between the comments, as shown below:
### Editing /etc/systemd/system/nginx.service.d/override.conf
### Anything between here and the comment below will become the new contents of the file
[Service]
LimitNOFILE=250000
### Lines below this comment will be discarded
### /etc/systemd/system/nginx.service
Save the file and restart nginx
systemctl restart nginx.service
Check again the limits and also nginx:
cat /proc/$(cat /var/run/nginx.pid)/limits | grep -i 'Max open files'
nginx -t
1 Like
cosmos
August 8, 2025, 11:27am
9
I 've changed the file
and restart nginx
nginx t
It doesnt change
ps: Can I nurn off webmail.test.com.log logs, to decrease number of open files?
this is my /etc/nginx/nginx.conf
[details="Спойлер"]
# Server globals
user www-data;
worker_processes auto;
worker_rlimit_nofile 262144;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
include /etc/nginx/conf.d/main/*.conf;
include /etc/nginx/modules-enabled/*.conf;
# Worker config
events {
worker_connections 512;
use epoll;
multi_accept on;
}
http {
# Main settings
sendfile on;
tcp_nopush on;
tcp_nodelay on;
client_header_timeout 180s;
client_body_timeout 180s;
client_header_buffer_size 2k;
client_body_buffer_size 256k;
client_max_body_size 1024m;
large_client_header_buffers 4 8k;
send_timeout 60s;
keepalive_timeout 30s;
keepalive_requests 1000;
reset_timedout_connection on;
server_tokens off;
server_name_in_redirect off;
server_names_hash_max_size 512;
server_names_hash_bucket_size 512;
charset utf-8;
# FastCGI settings
fastcgi_buffers 512 4k;
fastcgi_buffer_size 256k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;
fastcgi_connect_timeout 30s;
fastcgi_read_timeout 300s;
fastcgi_send_timeout 180s;
fastcgi_cache_lock on;
fastcgi_cache_lock_timeout 5s;
fastcgi_cache_background_update on;
fastcgi_cache_revalidate on;
# Proxy settings
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header Early-Data $rfc_early_data;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass_header Set-Cookie;
proxy_buffers 256 4k;
proxy_buffer_size 32k;
proxy_busy_buffers_size 32k;
proxy_temp_file_write_size 256k;
proxy_connect_timeout 30s;
proxy_read_timeout 300s;
proxy_send_timeout 180s;
# Log format
log_format main '$remote_addr - $remote_user [$time_local] $request "$status" $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for"';
log_format bytes '$body_bytes_sent';
log_not_found off;
access_log off;
# access_log /var/log/nginx/combined.log;
error_log /var/log/nginx/error.log crit;
# Mime settings
include /etc/nginx/mime.types;
default_type application/octet-stream;
# Compression
gzip on;
gzip_vary on;
gzip_static on;
gzip_comp_level 6;
gzip_min_length 1024;
gzip_buffers 128 4k;
gzip_http_version 1.1;
gzip_types text/css text/javascript text/js text/plain text/richtext text/shtml text/x-component text/x-java-source text/x-markdown text/x-script text/xml image/bmp image/svg+xml image/vnd.microsoft.icon image/x-icon font/otf font/ttf font/x-woff multipart/bag multipart/mixed application/eot application/font application/font-sfnt application/font-woff application/javascript application/javascript-binast application/json application/ld+json application/manifest+json application/opentype application/otf application/rss+xml application/ttf application/truetype application/vnd.api+json application/vnd.ms-fontobject application/wasm application/xhtml+xml application/xml application/xml+rss application/x-httpd-cgi application/x-javascript application/x-opentype application/x-otf application/x-perl application/x-protobuf application/x-ttf;
gzip_proxied any;
# Cloudflare IPs
include /etc/nginx/conf.d/cloudflare.inc;
# SSL PCI compliance
ssl_buffer_size 1369;
ssl_ciphers "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:DHE-RSA-AES256-SHA256";
ssl_dhparam /etc/ssl/dhparam.pem;
ssl_early_data on;
ssl_ecdh_curve auto;
ssl_prefer_server_ciphers on;
ssl_protocols TLSv1.2 TLSv1.3;
ssl_session_cache shared:SSL:20m;
ssl_session_tickets on;
ssl_session_timeout 7d;
resolver 127.0.0.53 valid=300s ipv6=off;
resolver_timeout 5s;
# Error pages
error_page 403 /error/404.html;
error_page 404 /error/404.html;
error_page 410 /error/410.html;
error_page 500 501 502 503 504 505 /error/50x.html;
# Proxy cache
proxy_cache_path /var/cache/nginx levels=2 keys_zone=cache:10m inactive=60m max_size=1024m;
proxy_cache_key "$scheme$request_method$host$request_uri";
proxy_temp_path /var/cache/nginx/temp;
proxy_ignore_headers Cache-Control Expires;
proxy_cache_use_stale error timeout invalid_header updating http_502;
proxy_cache_valid any 1d;
# FastCGI cache
fastcgi_cache_path /var/cache/nginx/micro levels=1:2 keys_zone=microcache:10m inactive=30m max_size=1024m;
fastcgi_cache_key "$scheme$request_method$host$request_uri";
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;
fastcgi_cache_use_stale error timeout invalid_header updating http_500 http_503;
add_header X-FastCGI-Cache $upstream_cache_status;
# Cache bypass
map $http_cookie $no_cache {
default 0;
~SESS 1;
~wordpress_logged_in 1;
}
# File cache (static assets)
open_file_cache max=10000 inactive=30s;
open_file_cache_valid 60s;
open_file_cache_min_uses 2;
open_file_cache_errors off;
# Wildcard include
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/conf.d/domains/*.conf;
}
[/details]
cosmos:
It doesnt change
It doesn’t change because Nginx can’t restart.
killall nginx or restart the server and the change should be done.
cosmos
August 8, 2025, 11:57am
11
Unfortinally killall nginx doesnt help,
By the way can I decrease max open files if I cant inc max open limits?
Force the kill:
killall -9 nginx
You don’t need to rebuild the server. If the above command doesn’t work, reboot the server.
1 Like
system
September 7, 2025, 12:04pm
13
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