August 2022

PostgreSQL

postgresql internals

nice write up https://www.interdb.jp/pg/ and this might help a little if you are and Oracle person moving to PostgreSQL https://wiki.postgresql.org/wiki/PostgreSQL_for_Oracle_DBAs#REDO_and_Archiving

Linux RHEL/CentOS/OEL

linux determine your logical and physical volume partitioning

https://www.thegeekdiary.com/centos-rhel-how-to-find-logical-volumes-lvs-that-are-part-of-a-physical-volume-pv-in-lvm/#:~:text=Using%20lvdisplay%20command,along%20with%20their%20physical%20volumes. Then creating a boot partition on RHEL 6 or centos 6 https://docs.hytrust.com/DataControl/Admin_Guide-4.0/Content/Books/Admin-Guide/Linux-Root-Swap-Drive-Encryption/Creating-Boot-Partition-RHEL-CentOS-6.htm Then if you have to fix a

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