check UDP / TCP max mem size

https://git.fairkom.net/hosting/fairmeeting/-/wikis/videobridge-VM-installation

• jvb-hetzner-0
• jvb-hetzner-1
• jvb-internex-0
• jvb-argoit-0

increase the TCP and UDP receive buffer size
check default settings first with sysctl -a | grep mem

append in /etc/sysctl.conf

# increase Linux TCP buffer limits
net.core.rmem_max = 10485760
net.core.wmem_max = 10485760

# increase Linux autotuning TCP buffer limits
# min, default, and max number of bytes to use
net.ipv4.tcp_mem = 3001413 4001884 6002826
net.ipv4.tcp_rmem = 4096 87380 4194304
net.ipv4.tcp_wmem = 4096 16384 4194304

# increase Linux autotuning UDP buffer limits
net.ipv4.udp_mem = 764178 1018904 1528356

load with sysctl -p

Check in jvb.log value for org.ice4j.ice.harvest.AbstractUdpListener.SO_RCVBUF see also https://community.jitsi.org/t/jitsi-dev-udp-packet-loss/13056/7

Check RcvbufErrors with netstat -su

sudo sysctl -w net.core.rmem_max=10485760
sudo sysctl -w net.core.netdev_max_backlog=100000

changed the description

marked the checklist item jvb-hetzner-1 as completed

changed the description

internex-0 bridge had:

root@serv86432101:~# netstat -su
Udp:
    1475838498 packets received
    52687 packets to unknown port received
    31590742 packet receive errors
    2604711533 packets sent
    31590742 receive buffer errors
    0 send buffer errors

adapting values as above, but:

root@serv86432101:~# sysctl -p
sysctl: cannot stat /proc/sys/net/core/rmem_max: No such file or directory
sysctl: cannot stat /proc/sys/net/core/wmem_max: No such file or directory
net.ipv4.tcp_mem = 3001413 4001884 6002826
sysctl: cannot stat /proc/sys/net/ipv4/tcp_rmem: No such file or directory
sysctl: cannot stat /proc/sys/net/ipv4/tcp_wmem: No such file or directory
sysctl: cannot stat /proc/sys/net/ipv4/udp_mem: No such file or director

so only keep one

procedure may also be required on host machine - observing

Again: Jitsi videobridges on a VM is not ideal - vare metal is first choice!

marked the checklist item jvb-internex-0 as completed

closed