MIS Systems Thread, Virtualise SIMS in Technical; Originally Posted by cmpwat
Trying really hard not to flog a dead horse with this Thread but was wondering how ...
2nd November 2013, 02:45 PM #61
Did you read my comment about having too much RAM on virtual machines? 24gb is huge! Try it with 4gb of ram instead.
Originally Posted by cmpwat
More is not always better when it comes to virtualization!
2nd November 2013, 04:52 PM #62
Our SIMS server is on a physical box: that was only down to forgetting we had an extra ESX licence. We have the same issues - 16 cores it can play with, 48GB ram, SAS drives and reports are still often sluggish as is the rest of SIMS if the data admins are running large reports etc. I intend to P2V it at Easter and expect identical performance.
2nd November 2013, 05:03 PM #63
Do you think if the SIMS database was on an SSD it would improve the situation?
Originally Posted by synaesthesia
2nd November 2013, 06:02 PM #64
Ours is virtualised on ESXi, has been for a while. 8 Opteron cores, 30GB of RAM dedicated (no pagefile on the hypervisor). Also has 8 10k SAS in RAID 10. Reports can still sometimes take a little time but they're pretty quick now. Overall VM performance is mentally quick though, disk I/O is awesome.
2nd November 2013, 07:15 PM #65
Ours is virtualized and has been for over a year now with no noticeable issues, but we are a small site in general terms.
I have had to rerun the database reindex patch on a couple of occasions so might be worth investigating that if you are having performance problems.
5th November 2013, 10:19 AM #66
We're running on Hyper-V with 4 processors and 8GB of RAM. Underlying system is iSCSI (two host cluster with 16 core Opterons, and 72GB of RAM), which might not be helping. We definitely noticed a speed decrease when switching to this brand new system, versus a 5-year old physical server.
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