26 lines
928 B
Bash
26 lines
928 B
Bash
#!/bin/bash
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# Memory state with use of "free"
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MEM_TOTAL=$(free -m | awk '/^Mem:/ { print $2 } ')
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MEM_USED=$(free -m | awk '/^Mem:/ { print $3 } ')
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# ARC state with use of "/proc/spl/kstat/zfs/arcstats"
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FLOAT_ARC_USED=$(awk '/^size/ { print $3 / 1048576 }' < /proc/spl/kstat/zfs/arcstats)
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INT_ARC_USED=${FLOAT_ARC_USED%.*}
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# Calculated values
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MEM_SYSTEM=$(($MEM_USED-INT_ARC_USED))
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MEM_AVAILABLE=$(($MEM_TOTAL-$MEM_SYSTEM))
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# output
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echo -e "\nMemory overview:\n"
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printf "\nTotal Memory:,Used Memory:,Available Memory:,Memory ARC:,Memory Sys & KVM:\n$MEM_TOTAL MiB,$MEM_USED MiB,$MEM_AVAILABLE MiB,$INT_ARC_USED MiB,$MEM_SYSTEM MiB\n\n" | column -t -s ','
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echo -e "\nOutput definition:"
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echo -e "Total Memory: Memory installed on system
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Available Memory: ['Total Memory' - 'Memory Sys & KVM']
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Memory ARC: Memory used by ZFS RAM cache (ARC)
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Memory Sys & KVM: Memory used by containers, VMs and system\n" | column -t -s ' '
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