Showing posts with label RHEL. Show all posts
Showing posts with label RHEL. Show all posts
Wednesday, January 20, 2016
Transparent HugePages on several Linux kernels should be turned off
Even though the document "ALERT: Disable Transparent HugePages on SLES11, RHEL6, RHEL7, OL6, OL7 and UEK2 Kernels" in note ID 1557478.1 on MOS has been out there for years, it is still good information to have that the Transparent HugePages (not regular HugePages) feature is enabled by default AND that it can cause instability in RAC or non-RAC environments! Since Oracle recommends turning this off in all your database machines, do you know if it is off in your systems?
Monday, October 27, 2014
Signal 17 and RHEL upgrades
This weekend we upgraded servers to Red Hat Enterprise Linux (RHEL) 5.11 but found quite a surprise when the DBA ran a simple ps command and received the following error message:
Signal 17 (CHLD) caught by ps (procps version 3.2.8).
What did we find out by searching the Interwebs in the middle of the night? A KB article from Red Hat (subscription required) that told us that the error is confirmed on version 6.6 and has a few simple solutions. Luckily our system administrators were able to implement one of them in order to return the ps command back to service!
Signal 17 (CHLD) caught by ps (procps version 3.2.8).
What did we find out by searching the Interwebs in the middle of the night? A KB article from Red Hat (subscription required) that told us that the error is confirmed on version 6.6 and has a few simple solutions. Luckily our system administrators were able to implement one of them in order to return the ps command back to service!
Subscribe to:
Posts (Atom)