/var/lib/pcp/config/pmchart/Overview is in pcp-gui 1.5.11.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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version 1
# CPU view
chart title "CPU Utilization [%h]" style utilization
plot legend "User" color #2d2de2 metric kernel.all.cpu.user
plot legend "Sys" color #e71717 metric kernel.all.cpu.sys
optional-plot legend "Nice" color #c2f3c2 metric kernel.all.cpu.nice
optional-plot legend "Intr" color #cdcd00 metric kernel.all.cpu.intr
optional-plot legend "Wait" color #00cdcd metric kernel.all.cpu.wait.total
optional-plot legend "Steal" color #fba2f5 metric kernel.all.cpu.steal
plot legend "Idle" color #16d816 metric kernel.all.cpu.idle
chart title "Average Load [%h]" style plot antialiasing off
plot legend "1 min" metric kernel.all.load instance "1 minute"
plot legend "# cpus" metric hinv.ncpu
# Disk view
chart title "IOPS over all Disks [%h]" style stacking
plot legend "Reads" color yellow metric disk.all.read
plot legend "Writes" color violet metric disk.all.write
# Netbytes view
chart title "Network Interface Bytes [%h]" style stacking
plot legend "in %i" metric network.interface.in.bytes not-matching "^lo|^sl|^ppp|^sit|^gif|^stf|^wlt|^vmnet|^MS TCP Loopback interface"
plot legend "out %i" metric network.interface.out.bytes not-matching "^lo|^sl|^ppp|^sit|^gif|^stf|^wlt|^vmnet|^MS TCP Loopback interface"
chart title "Real Memory Usage [%h]" style stacking
optional-plot color #9cffab metric mem.util.cached
optional-plot color #fe68ad metric mem.util.bufmem
optional-plot color #ffae2c metric mem.util.other
plot color #00ff00 metric mem.util.free
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