I'm using Apache 2.4 on AlmaLinux 8. When I publicate a hundreds GB file and if someone starts downloading it, Apache RAM usage (especially VIRT) becomes bigger and bigger, starts swapping and ultimately, boom. Why this happens, and is there any way to prevent this? Thanks.
This is ps:
ps -eF | grep httpd
root 933 1 0 73036 7604 0 07:54 ? 00:00:03 /usr/sbin/httpd -DFOREGROUND
apache 1372 933 0 76259 4552 0 07:54 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
apache 1373 933 0 76603 5068 1 07:54 ? 00:00:00 /usr/sbin/httpd -DFOREGROUND
apache 1374 933 11 866436 63304 0 07:54 ? 01:50:24 /usr/sbin/httpd -DFOREGROUND
apache 12818 933 0 516413 22520 1 10:20 ? 00:01:53 /usr/sbin/httpd -DFOREGROUND
and this is top (filtered by apache):
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1374 apache 20 0 3384.5m 57.2m 6.1m S 14.2 3.9 110:45.56 httpd
1372 apache 20 0 297.9m 4.4m 3.1m S 0.0 0.3 0:00.00 httpd
1373 apache 20 0 299.2m 4.9m 3.6m S 0.0 0.3 0:00.57 httpd
12818 apache 20 0 2017.2m 21.8m 6.8m S 0.0 1.5 1:53.54 httpd
These are after 12 hours of running.
