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| Control and Data memory https://3parug.net/viewtopic.php?f=18&t=631 |
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| Author: | ianc1990 [ Mon Mar 10, 2014 9:23 am ] |
| Post subject: | Control and Data memory |
Hi Guys, New to the forum so HELLO ALL! We have a 7400 at our primary site with 120+ VMS (VMware ESX 5.5) and a few DBs backed onto it. AO with an SSD tier and the rest is SAS disk. We have recently experienced a few issues, primarily with he ESX host/VM performance and VMware fails things like DRS because it doesn't map the VMDK properly, which points towards a storage issue. My 'Control Memory' and 'Data Memory' seem very high. Control memory is at 80% and data memory is 95% but this is a quiet day - not managed to check it when under load yet. In terms of the disk, I/O seems normal for the speed the disks are rated at, if not a little low (thanks to AO/the SSDs!). Is this something we should be worried about and is there any way to identify if this could be our issue? Thanks for your help! Ian |
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| Author: | Cleanur [ Mon Mar 10, 2014 10:51 am ] |
| Post subject: | Re: Control and Data memory |
It's normal the 3PAR uses a dynamic caching mechanism, but it will try to keep both as fully populated as possible at all times. Nothing to worry about. |
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| Author: | ianc1990 [ Mon Mar 10, 2014 11:57 am ] |
| Post subject: | Re: Control and Data memory |
Thanks for your reply! We have an issue where when we turn AV on, everything dies. I have just tested turning AV back on (at global level) and whilst the CPU percentage goes up ever so slightly, the Interrupts/s goes from under 5,000 to over 50,000 - same with the Switches/s. From under 5,000, to over 40,000. Cache performance is also affected, from under 1000 counts/s, to over 10,000 with AV on. Anyone got any experience with this and can perhaps recommend anything? |
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| Author: | spencer.ryan [ Tue Mar 11, 2014 2:14 pm ] |
| Post subject: | Re: Control and Data memory |
No idea about the context switches, but un-used RAM is wasted RAM, especially when it is a cache. Pretty much every modern OS tries to keep RAM as full as possible. This isn't an issue. |
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| Author: | Cleanur [ Thu Mar 13, 2014 4:53 pm ] |
| Post subject: | Re: Control and Data memory |
What do you mean by AV, host based antivirus ? |
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| Author: | Josh26 [ Thu Mar 13, 2014 5:51 pm ] |
| Post subject: | Re: Control and Data memory |
ianc1990 wrote: Thanks for your reply! We have an issue where when we turn AV on, everything dies. I just had nearly an identical situation yesterday. Are you by chance using McAfee MOVE? |
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| Author: | ianc1990 [ Mon Mar 17, 2014 11:57 am ] |
| Post subject: | Re: Control and Data memory |
Indeed - McAfee MOVE it was  Avoid it at all costs IMO. I have now installed TrendMicro Deep security 9.0. Not only have the issues disappeared, but WHAT A DIFFERENCE to McAfee in terms of installation and also management. Documentation is also a pleasure to follow and read - so well written. An amazing product and I cannot recommend it enough. (just make sure you go for Patch2 as it includes VMware 5.5 support amongst other things) Drop me a message if you need any help with it Ian |
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