/usr/share/doc/dphys-swapfile/examples/dphys-swapfile.example is in dphys-swapfile 20100506-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | # /etc/dphys-swapfile - user settings for dphys-swapfile package
# author Neil Franklin, last modification 2010.05.05
# copyright ETH Zuerich Physics Departement
# use under either modified/non-advertising BSD or GPL license
# this file is sourced with . so full normal sh syntax applies
# the default settings are added as commented out CONF_*=* lines
# where we want the swapfile to be, this is the default
#CONF_SWAPFILE=/var/swap
# set size to absolute value, leaving empty (default) then uses computed value
# you most likely don't want this, unless you have an special disk situation
#CONF_SWAPSIZE=
# set size to computed value, this times RAM size, dynamically adapts,
# guarantees that there is enough swap without wasting disk space on excess
#CONF_SWAPFACTOR=2
# restrict size (computed and absolute!) to maximally this limit
# can be set to empty for no limit, but beware of filled partitions!
# this is/was a (outdated?) 32bit kernel limit (in MBytes), do not overrun it
# but is also sensible on 64bit to prevent filling /var or even / partition
#CONF_MAXSWAP=2048
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