VMWare

Quiescing An Linux Server Running An Oracle or Postgres Database When Taking A VMWare Snapshot Of The VM

Some time ago some of my colleagues started doing VMWare Snapshots (backups) of our Linux server that was running an Oracle database without mentioning it to me (I work part-time for them supporting important Oracle instances). Almost immediately I got a call saying Oracles was down, asking me to take a look at it. They …

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Linux Huge Page Configuration and Oracle Memory Management Compatibility

For large Oracle Database footprints – say 8GB or above (not really too large any more) configure Linux huge pages and assure Oracle’s SGA is using manual or Automatic Shared Memory Management. Note Automatic Memory Management (using MEMORY_MAX_TARGET) is not compatible with Linux huge pages. ┬áDo not confuse Automatic Shared Memory Management / ASMM (which …

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RHEL 6 Manually Creating A Logical Volume And Auto Mounting It As an Ext4 file system

RHEL 6 Manually Creating A Logical Volume And Auto Mounting It As Ext4 for a device that has been added to your VM and not previously used. The device should already be allocated and should show up with no other “fdisk’ed” devices on it – for this example (see my By The Way note immediately …

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Do not use VMWare Data Protection / VDP and Oracle on production or mission critical Oracle databases

Nope don’t use it for mission critical Oracle databases if you value the DB… VDP has to quiesce (stop / silence) the DB – and this can cause performance and in my case – control file and eventually redolog corruption. VMWares “Oracle Databases On VMWare Best Practices Guide” copyright 2016 VMWare states on page 54… …

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