After a reload, old haproxy process remains there and doesn't release memory (sometime it does but behaviour is not consistent). After killing the old process (several days old) the memory get released.
Expected behavior: We have long lived connections but these connections should be cleared after 4-7 hours max from old process after reload.
ubuntu@ip-10-0-5-193:~$ uname -a
Linux ip-10-0-5-193 3.13.0-48-generic #80-Ubuntu SMP Thu Mar 12 11:16:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
ubuntu@ip-10-0-5-193:~$ haproxy -v
HA-Proxy version 1.5.14 2015/07/02
Copyright 2000-2015 Willy Tarreau <willy@haproxy.org>
ubuntu@ip-10-0-5-193:~$ date
Tue Apr 5 00:44:29 UTC 2016
ubuntu@ip-10-0-5-193:~$ ps -ef | grep [h]aproxy
haproxy 7494 1 15 Apr01 ? 13:26:20 /usr/local/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -D -sf 30065
haproxy 13357 1 18 Apr04 ? 02:40:15 /usr/local/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -D -sf 7494
ubuntu@ip-10-0-5-193:~$ free -g
total used free shared buffers cached
Mem: 29 26 3 0 0 0
-/+ buffers/cache: 25 4
Swap: 0 0 0
ubuntu@ip-10-0-5-193:~$ sudo kill 7494
ubuntu@ip-10-0-5-193:~$ free -g
total used free shared buffers cached
Mem: 29 10 19 0 0 0
-/+ buffers/cache: 9 20
Swap: 0 0 0
Compiling info:
$ wget http://www.haproxy.org/download/1.5/src/haproxy-1.5.14.tar.gz
$ wget ftp://g.oswego.edu/pub/misc/malloc.c
$ apt-get install -y libssl-dev make libpcre3-dev
$ tar zxvf haproxy-1.5.14.tar.gz; cd haproxy-1.5.14/
$ make TARGET=linux2628 CPU=native USE_STATIC_PCRE=1 ADDLIB=-lz USE_OPENSSL=1 DLMALLOC_SRC=../malloc.c
$ make install
Edit: added compile time info
