Steam performance

Tuning varies heavily on OS, video card, machine, etc. but some helpful tips.
See Also nvidia configuration.

max_map_count

Increase the amount of memory a process is allowed to use.

# see current setting
cat /proc/sys/vm/max_map_count # 65530 by default

# see all applied settings
sudo sysctl --system

# /usr/lib/sysctl.d/99-vm-max_map_count.conf

# 512 * 1024 (choose based on hardware)
# I've seen higher amounts listed online as well
vm.max_map_count=524288