Здравствуйте.
После включения slice наблюдается скачкообразный рост потребляемой памяти поочередно на нескольких воркерах.
Общий объем данных на бэкэнде 1 Tb, средний размер файла примерно 4-5 Gb.
При достижении размера cache директории в 6 Gb, объем потребляемой памяти увеличивается примерно на 15 Gb.
В дампе памяти воркера по адресу 00007f982bb4d000 видим множество заголовков запросов и ответов между предположительно самими данными.
При размере slice 5m рост потребления памяти практически не заметен.
В какую сторону копать?
Конфигурация nginx:
proxy_cache_path /cache/site levels=2:2 keys_zone=site_cache:500m inactive=3d;
server {
slice 1m;
proxy_cache site_cache;
proxy_cache_key "$request_uri|$slice_range";
proxy_cache_valid 200 206 1d;
proxy_set_header Range $slice_range;
proxy_http_version 1.1;
# ...
}
nginx version: nginx/1.11.2
# top
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
10412 www-data 20 0 4320028 2.115g 166348 S 5.3 4.5 1:44.68 nginx: worker process
# pmap 10412
10412: nginx: worker process
0000000000400000 1160K r-x-- nginx
0000000000721000 4K r---- nginx
0000000000722000 120K rw--- nginx
0000000000740000 132K rw--- [ anon ]
000000000205a000 132K rw--- [ anon ]
000000000207b000 4K r---- [ anon ]
0000000040131000 128K rw--- [ anon ]
000000004152e000 128K rw--- [ anon ]
0000000041e09000 128K rw--- [ anon ]
00007f982bb4d000 2606804K rw--- [ anon ]
00007f98cad02000 1676K rw--- [ anon ]
00007f98caf07000 1156K rw--- [ anon ]
00007f98cb028000 102400K rw-s- zero (deleted)
00007f98d1428000 102400K rw-s- zero (deleted)
00007f98d7828000 8400K rw--- [ anon ]
00007f98d80b5000 1156K rw--- [ anon ]
00007f98d81d6000 5120K rw-s- zero (deleted)
00007f98d86d6000 20480K rw-s- zero (deleted)
00007f98d9ad6000 512000K rw-s- zero (deleted)
00007f98f8ed6000 102400K rw-s- zero (deleted)
00007f98ff2d6000 102400K rw-s- zero (deleted)
00007f99056d6000 102400K rw-s- zero (deleted)
00007f990bad6000 102400K rw-s- zero (deleted)
00007f9911ed6000 102400K rw-s- zero (deleted)
00007f99182d6000 102400K rw-s- zero (deleted)
00007f991e6d6000 20480K rw-s- zero (deleted)
00007f991fad6000 102400K rw-s- zero (deleted)
00007f9925ed6000 20480K rw-s- zero (deleted)
00007f99272d6000 102400K rw-s- zero (deleted)
00007f992d6d6000 102400K rw-s- zero (deleted)
00007f9933ad6000 102400K rw-s- zero (deleted)
00007f9939ed6000 102400K rw-s- zero (deleted)
00007f99402d6000 20480K rw-s- zero (deleted)
00007f99416d6000 102400K rw-s- zero (deleted)
00007f9947ad6000 10240K rw-s- zero (deleted)
00007f99484d6000 20480K rw-s- zero (deleted)
00007f99498d6000 102400K rw-s- zero (deleted)
00007f994fcd6000 20480K rw-s- zero (deleted)
00007f99510d6000 4096K rw--- [ anon ]
00007f99514d6000 92K r-x-- libresolv-2.19.so
00007f99514ed000 2048K ----- libresolv-2.19.so
00007f99516ed000 4K r---- libresolv-2.19.so
00007f99516ee000 4K rw--- libresolv-2.19.so
00007f99516ef000 8K rw--- [ anon ]
00007f99516f1000 20K r-x-- libnss_dns-2.19.so
00007f99516f6000 2044K ----- libnss_dns-2.19.so
00007f99518f5000 4K r---- libnss_dns-2.19.so
00007f99518f6000 4K rw--- libnss_dns-2.19.so
00007f99518f7000 2048K rw--- [ anon ]
00007f9951b71000 1024K rw--- [ anon ]
00007f9951c71000 44K r-x-- libnss_files-2.19.so
00007f9951c7c000 2044K ----- libnss_files-2.19.so
00007f9951e7b000 4K r---- libnss_files-2.19.so
00007f9951e7c000 4K rw--- libnss_files-2.19.so
00007f9951e7d000 44K r-x-- libnss_nis-2.19.so
00007f9951e88000 2044K ----- libnss_nis-2.19.so
00007f9952087000 4K r---- libnss_nis-2.19.so
00007f9952088000 4K rw--- libnss_nis-2.19.so
00007f9952089000 92K r-x-- libnsl-2.19.so
00007f99520a0000 2044K ----- libnsl-2.19.so
00007f995229f000 4K r---- libnsl-2.19.so
00007f99522a0000 4K rw--- libnsl-2.19.so
00007f99522a1000 8K rw--- [ anon ]
00007f99522a3000 36K r-x-- libnss_compat-2.19.so
00007f99522ac000 2044K ----- libnss_compat-2.19.so
00007f99524ab000 4K r---- libnss_compat-2.19.so
00007f99524ac000 4K rw--- libnss_compat-2.19.so
00007f99524ad000 88K r-x-- libgcc_s.so.1
00007f99524c3000 2044K ----- libgcc_s.so.1
00007f99526c2000 4K rw--- libgcc_s.so.1
00007f99526c3000 1772K r-x-- libc-2.19.so
00007f995287e000 2044K ----- libc-2.19.so
00007f9952a7d000 16K r---- libc-2.19.so
00007f9952a81000 8K rw--- libc-2.19.so
00007f9952a83000 20K rw--- [ anon ]
00007f9952a88000 180K r-x-- libGeoIP.so.1.6.0
00007f9952ab5000 2044K ----- libGeoIP.so.1.6.0
00007f9952cb4000 4K r---- libGeoIP.so.1.6.0
00007f9952cb5000 8K rw--- libGeoIP.so.1.6.0
00007f9952cb7000 96K r-x-- libz.so.1.2.8
00007f9952ccf000 2044K ----- libz.so.1.2.8
00007f9952ece000 4K r---- libz.so.1.2.8
00007f9952ecf000 4K rw--- libz.so.1.2.8
00007f9952ed0000 2220K r-x-- libcrypto.so.1.0.0
00007f99530fb000 2048K ----- libcrypto.so.1.0.0
00007f99532fb000 112K r---- libcrypto.so.1.0.0
00007f9953317000 52K rw--- libcrypto.so.1.0.0
00007f9953324000 16K rw--- [ anon ]
00007f9953328000 376K r-x-- libssl.so.1.0.0
00007f9953386000 2044K ----- libssl.so.1.0.0
00007f9953585000 16K r---- libssl.so.1.0.0
00007f9953589000 28K rw--- libssl.so.1.0.0
00007f9953590000 244K r-x-- libpcre.so.3.13.1
00007f99535cd000 2044K ----- libpcre.so.3.13.1
00007f99537cc000 4K r---- libpcre.so.3.13.1
00007f99537cd000 4K rw--- libpcre.so.3.13.1
00007f99537ce000 432K r-x-- libluajit-5.1.so.2.0.2
00007f995383a000 2048K ----- libluajit-5.1.so.2.0.2
00007f9953a3a000 8K r---- libluajit-5.1.so.2.0.2
00007f9953a3c000 4K rw--- libluajit-5.1.so.2.0.2
00007f9953a3d000 1044K r-x-- libm-2.19.so
00007f9953b42000 2044K ----- libm-2.19.so
00007f9953d41000 4K r---- libm-2.19.so
00007f9953d42000 4K rw--- libm-2.19.so
00007f9953d43000 36K r-x-- libcrypt-2.19.so
00007f9953d4c000 2048K ----- libcrypt-2.19.so
00007f9953f4c000 4K r---- libcrypt-2.19.so
00007f9953f4d000 4K rw--- libcrypt-2.19.so
00007f9953f4e000 184K rw--- [ anon ]
00007f9953f7c000 100K r-x-- libpthread-2.19.so
00007f9953f95000 2044K ----- libpthread-2.19.so
00007f9954194000 4K r---- libpthread-2.19.so
00007f9954195000 4K rw--- libpthread-2.19.so
00007f9954196000 16K rw--- [ anon ]
00007f995419a000 12K r-x-- libdl-2.19.so
00007f995419d000 2044K ----- libdl-2.19.so
00007f995439c000 4K r---- libdl-2.19.so
00007f995439d000 4K rw--- libdl-2.19.so
00007f995439e000 140K r-x-- ld-2.19.so
00007f99544ad000 1052K rw--- [ anon ]
00007f99545bb000 8K rw-s- [aio] (deleted)
00007f99545bd000 4K rw-s- zero (deleted)
00007f99545be000 8K rw--- [ anon ]
00007f99545c0000 4K r---- ld-2.19.so
00007f99545c1000 4K rw--- ld-2.19.so
00007f99545c2000 4K rw--- [ anon ]
00007fff972bf000 132K rw--- [ stack ]
00007fff973e1000 8K r---- [ anon ]
00007fff973e3000 8K r-x-- [ anon ]
ffffffffff600000 4K r-x-- [ anon ]
total 4860256K
