Hello,
I'm running openresty on a server which has 16GB RAM but nginx worker eating 130GB virtual memory.
My build
libmaxminddb_version="1.5.2"
pcre_version="8.44"
openssl_version="1.1.1j"
openssl_patch_version="1.1.1j"
openresty_version="1.19.3.1"
%Cpu(s): 0.8 us, 0.2 sy, 0.0 ni, 98.8 id, 0.1 wa, 0.0 hi, 0.1 si, 0.0 st
KiB Mem : 16292728 total, 1499480 free, 12218212 used, 2575036 buff/cache
KiB Swap: 8191996 total, 3968020 free, 4223976 used. 2826724 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
9575 nginx 20 0 131.3g 848244 53072 S 2.7 5.2 1:19.72 nginx
18912 root 20 0 1548356 41152 7844 S 2.3 0.3 4816:54 filebeat
9569 nginx 20 0 131.3g 845640 50472 S 1.3 5.2 1:00.61 nginx
9566 nginx 20 0 131.3g 840052 45020 S 1.0 5.2 0:20.07 nginx
9571 nginx 20 0 131.3g 841448 46280 S 1.0 5.2 0:32.63 nginx
9573 nginx 20 0 131.3g 843320 48152 S 1.0 5.2 0:37.47 nginx
9574 nginx 20 0 131.3g 844060 48892 S 1.0 5.2 0:40.68 nginx
9564 nginx 20 0 131.3g 834644 39612 S 0.7 5.1 0:12.78 nginx
9570 nginx 20 0 131.3g 839748 44596 S 0.7 5.2 0:25.13 nginx
12 root 20 0 0 0 0 I 0.3 0.0 1335:31 rcu_sched
9565 nginx 20 0 131.3g 834116 39080 S 0.3 5.1 0:14.27 nginx
9567 nginx 20 0 131.3g 839184 44148 S 0.3 5.2 0:22.49 nginx
9568 nginx 20 0 131.3g 839264 44232 S 0.3 5.2 0:25.51 nginx
9572 nginx 20 0 131.3g 844220 49048 S 0.3 5.2 0:53.67 nginx
11783 nginx 20 0 140.4g 212460 49072 S 0.3 1.3 51:25.81 nginx
14224 root 20 0 159076 8952 7508 S 0.3 0.1 0:00.08 sshd
14471 root 20 0 0 0 0 I 0.3 0.0 0:00.53 kworker/3:+
I see there a lot of 102400 rw-s- zero (deleted)
Exactly 2676 lines rw-s- zero (deleted) showing when I exec pmap -x 9572
# pmap -x 9572
9572: nginx: worker process
Address Kbytes RSS Dirty Mode Mapping
0000000000400000 4480 3536 0 r-x-- edge
0000000000a5f000 196 196 4 r---- edge
0000000000a90000 172 172 140 rw--- edge
0000000000abb000 164 48 48 rw--- [ anon ]
0000000002993000 347500 347496 347496 rw--- [ anon ]
0000000017cee000 410892 410680 410680 rw--- [ anon ]
00007f1c48e75000 102400 0 0 rw-s- zero (deleted)
00007f1c4f275000 102400 0 0 rw-s- zero (deleted)
00007f1c55675000 102400 0 0 rw-s- zero (deleted)
00007f1c5ba75000 102400 0 0 rw-s- zero (deleted)
00007f1c61e75000 102400 0 0 rw-s- zero (deleted)
00007f1c68275000 102400 0 0 rw-s- zero (deleted)
00007f1c6e675000 102400 0 0 rw-s- zero (deleted)
00007f1c74a75000 102400 0 0 rw-s- zero (deleted)
00007f1c7ae75000 102400 0 0 rw-s- zero (deleted)
00007f1c81275000 102400 0 0 rw-s- zero (deleted)
00007f1c87675000 102400 0 0 rw-s- zero (deleted)
00007f1c8da75000 102400 0 0 rw-s- zero (deleted)
00007f1c93e75000 102400 0 0 rw-s- zero (deleted)
00007f1c9a275000 102400 0 0 rw-s- zero (deleted)
00007f1ca0675000 102400 0 0 rw-s- zero (deleted)
00007f1ca6a75000 102400 0 0 rw-s- zero (deleted)
00007f1cace75000 102400 0 0 rw-s- zero (deleted)
00007f1cb3275000 102400 0 0 rw-s- zero (deleted)
00007f1cb9675000 102400 0 0 rw-s- zero (deleted)
00007f1cbfa75000 102400 0 0 rw-s- zero (deleted)
00007f1cc5e75000 102400 0 0 rw-s- zero (deleted)
00007f1ccc275000 102400 0 0 rw-s- zero (deleted)
00007f1cd2675000 102400 0 0 rw-s- zero (deleted)
00007f1cd8a75000 102400 0 0 rw-s- zero (deleted)
00007f1cdee75000 102400 0 0 rw-s- zero (deleted)
00007f1ce5275000 102400 0 0 rw-s- zero (deleted)
00007f1ceb675000 102400 0 0 rw-s- zero (deleted)
00007f1cf1a75000 102400 0 0 rw-s- zero (deleted)
00007f1cf7e75000 102400 0 0 rw-s- zero (deleted)
00007f1cfe275000 102400 0 0 rw-s- zero (deleted)
00007f1d04675000 102400 0 0 rw-s- zero (deleted)
00007f1d0aa75000 102400 0 0 rw-s- zero (deleted)
00007f1d10e75000 102400 0 0 rw-s- zero (deleted)
00007f1d17275000 102400 0 0 rw-s- zero (deleted)
00007f1d1d675000 102400 0 0 rw-s- zero (deleted)
00007f1d23a75000 102400 0 0 rw-s- zero (deleted)
00007f1d29e75000 102400 0 0 rw-s- zero (deleted)
00007f1d30275000 102400 0 0 rw-s- zero (deleted)
00007f1d36675000 102400 0 0 rw-s- zero (deleted)
00007f1d3ca75000 102400 0 0 rw-s- zero (deleted)
00007f1d42e75000 102400 116 116 rw-s- zero (deleted)
00007f1d49275000 102400 0 0 rw-s- zero (deleted)
00007f1d4f675000 102400 0 0 rw-s- zero (deleted)
00007f1d55a75000 102400 0 0 rw-s- zero (deleted)
00007f1d5be75000 102400 0 0 rw-s- zero (deleted)
00007f1d62275000 102400 0 0 rw-s- zero (deleted)
00007f1d68675000 102400 0 0 rw-s- zero (deleted)
00007f1d6ea75000 102400 0 0 rw-s- zero (deleted)
00007f1d74e75000 102400 0 0 rw-s- zero (deleted)
00007f1d7b275000 102400 0 0 rw-s- zero (deleted)
00007f1d81675000 102400 0 0 rw-s- zero (deleted)
00007f1d87a75000 102400 0 0 rw-s- zero (deleted)
thanks for reaching out