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--- lwc:mqtt [2021/09/21 15:24] – [Configuring for high # of connections (tested on 16.04)] John Harrison
+++ lwc:mqtt [2021/10/20 09:31] (current) – John Harrison
@@ Line 31: / Line 31: @@
 erase all retained messages: mosquitto_sub -i <client_id> -p <port> -h <host> --retained-only -t "#" -v | while read line; do let "x=x+1"; echo $x; mosquitto_pub -i <client_id> -p <port> -h <host> -t "${line% *}" -r -n; done'
 \\
 ===== HA Proxy: =====
@@ Line 37: / Line 36: @@
 ==== Configuring for high # of connections (tested on 16.04) ====
-edit /etc/sysctl.conf and add the following lines (increase open file limit and decrease memory use of TCP buffers:
+edit ''/etc/sysctl.conf'' and add the following lines (increase open file limit and decrease memory use of TCP buffers:
 <code>
 fs.file-max = 10000000
@@ Line 44: / Line 43: @@
 net.ipv4.tcp_rmem = 4096 4096 16777216
 net.ipv4.tcp_wmem = 4096 4096 16777216
-net.ipv4.ip_local_port_range = 1000 65535
+net.ipv4.ip_local_port_range = 15000 65535
 </code>
@@ Line 62: / Line 61: @@
 timeout server 66000000 # necessary?
 </code>
+check:
+<code>
+pidof haproxy
+cat /proc/630/limits | grep 'open files'
+</code>
+[[https://ma.ttias.be/linux-increase-ip_local_port_range-tcp-port-range/|increase ip_local_port_range]]
 === References ===