diff options
Diffstat (limited to 'docs/installation/virtual/vmware.rst')
-rw-r--r-- | docs/installation/virtual/vmware.rst | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/docs/installation/virtual/vmware.rst b/docs/installation/virtual/vmware.rst index c4299cbf..28614573 100644 --- a/docs/installation/virtual/vmware.rst +++ b/docs/installation/virtual/vmware.rst @@ -6,20 +6,31 @@ Running on VMware ESXi ESXi 5.5 or later
*****************
-.ova files are available for supporting users, and a VyOS can also be stood up using a generic Linux instance, and attaching the bootable ISO file and installing from the ISO
-using the normal process around `install image`.
+.ova files are available for supporting users, and a VyOS can also be stood up
+using a generic Linux instance, and attaching the bootable ISO file and
+installing from the ISO using the normal process around `install image`.
-.. NOTE:: There have been previous documented issues with GRE/IPSEC tunneling using the E1000 adapter on the VyOS guest, and use of the VMXNET3 has been advised.
+.. NOTE:: There have been previous documented issues with GRE/IPSEC tunneling
+ using the E1000 adapter on the VyOS guest, and use of the VMXNET3 has been
+ advised.
Memory Contention Considerations
--------------------------------
-When the underlying ESXi host is approaching ~92% memory utilisation it will start the balloon process in s a 'soft' state to start reclaiming memory from guest operating systems.
-This causes an artificial pressure using the vmmemctl driver on memory usage on the virtual guest. As VyOS by default does not have a swap file, this vmmemctl pressure is unable to
-force processes to move in memory data to the paging file, and blindly consumes memory forcing the virtual guest into a low memory state with no way to escape. The balloon can expand to 65% of
-guest allocated memory, so a VyOS guest running >35% of memory usage, can encounter an out of memory situation, and trigger the kernel oom_kill process. At this point a weighted
-lottery favouring memory hungry processes will be run with the unlucky winner being terminated by the kernel.
+When the underlying ESXi host is approaching ~92% memory utilisation it will
+start the balloon process in s a 'soft' state to start reclaiming memory from
+guest operating systems. This causes an artificial pressure using the vmmemctl
+driver on memory usage on the virtual guest. As VyOS by default does not have
+a swap file, this vmmemctl pressure is unable to force processes to move in
+memory data to the paging file, and blindly consumes memory forcing the
+virtual guest into a low memory state with no way to escape. The balloon
+can expand to 65% of guest allocated memory, so a VyOS guest running >35% of
+memory usage, can encounter an out of memory situation, and trigger the kernel
+oom_kill process. At this point a weighted lottery favouring memory hungry
+processes will be run with the unlucky winner being terminated by the kernel.
-It is advised that VyOS routers are configured in a resource group with adequate memory reservations so that ballooning is not inflicted on virtual VyOS guests.
+It is advised that VyOS routers are configured in a resource group with
+adequate memory reservations so that ballooning is not inflicted on
+virtual VyOS guests.
@@ -28,5 +39,8 @@ It is advised that VyOS routers are configured in a resource group with adequate References
----------
+.. stop_vyoslinter
+
https://muralidba.blogspot.com/2018/03/how-does-linux-out-of-memory-oom-killer.html
+.. start_vyoslinter
\ No newline at end of file |