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Difference between ‘pgscank/s’ and ‘pgscand/s’
In the sar output like below, there are pgscank and pgscand. In the man page, it says. This description is not much helpful to understand the difference between those two columns. These data are from kernel code which is showing in vmstat. It is basically updated when there’s memory reclaiming. If the reclaiming was happened […]
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5-level paging in KVM
Latest kernels such as RHEL8 and above are supporting 5-level page table. You can check if this is available/enabled by looking at /boot/config-$(uname -r). If you don’t want to use 5-level page table, you can disable that by adding ‘no5lvl’ as a kernel parameter in grub file (/boot/grub2/grubenv) and reboot the system. This 5 level […]
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Install mpykdump on local machine
Here is the sequence of commands to build mpykdump on your system. This is based on crash version 8.0.0. You may want to check what version of crash your system has to match it. Below is the sequence on RHEL8. You can ignore the error from ‘crash’ compile as we are not going to use […]
Sungju's Slow Life 