Comments on: Deploying VMware in a Linux Shop #PO2575 http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/ Go Green with Virtualization. Go UGLY Green with vmetc.com. Tue, 17 Apr 2012 03:50:42 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: Mike DiPetrillo http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/comment-page-2/#comment-1400 Mike DiPetrillo Sat, 18 Oct 2008 12:28:52 +0000 http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/#comment-1400 J, if you want you can email me off-line to figure out what's going on: http://www.mikedipetrillo.com/about.html. Where are you getting the values from? Virtual Center? esxtop? J, if you want you can email me off-line to figure out what’s going on: http://www.mikedipetrillo.com/about.html. Where are you getting the values from? Virtual Center? esxtop?

]]> By: Mike DiPetrillo http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/comment-page-2/#comment-5438 Mike DiPetrillo Sat, 18 Oct 2008 12:28:00 +0000 http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/#comment-5438 J, if you want you can email me off-line to figure out what's going on: http://www.mikedipetrillo.com/about.html. Where are you getting the values from? Virtual Center? esxtop? J, if you want you can email me off-line to figure out what’s going on: http://www.mikedipetrillo.com/about.html. Where are you getting the values from? Virtual Center? esxtop?

]]> By: J http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/comment-page-2/#comment-1396 J Fri, 17 Oct 2008 15:13:47 +0000 http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/#comment-1396 Thanks Mike and Rich,vary very interesting. It was exactly what I was supposing. I'm seeing 20% RDY (average) in my hosts (sometimes 45%...). Most of the VMs are configured with 2vCPU and are VMs with little load. The extrange thing is that I'm seeing 400 or 500 or 600 as values for the %WAIT parameter!! Is it a bug? I've to read this like 40 or 50 or 60% values? May be I 've to read the %TWAIT or %BWAIT calues insted the %WAIT value? Or may be it's correct. This seems to happen both in ESX 3.0.2 and ESX 3.5. TIA, J Thanks Mike and Rich,vary very interesting.
It was exactly what I was supposing. I’m seeing 20% RDY (average) in my hosts (sometimes 45%…). Most of the VMs are configured with 2vCPU and are VMs with little load.
The extrange thing is that I’m seeing 400 or 500 or 600 as values for the %WAIT parameter!!
Is it a bug? I’ve to read this like 40 or 50 or 60% values? May be I ‘ve to read the %TWAIT or %BWAIT calues insted the %WAIT value?
Or may be it’s correct.
This seems to happen both in ESX 3.0.2 and ESX 3.5.

TIA,
J

]]> By: J http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/comment-page-2/#comment-5444 J Fri, 17 Oct 2008 15:13:00 +0000 http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/#comment-5444 Thanks Mike and Rich,vary very interesting. It was exactly what I was supposing. I'm seeing 20% RDY (average) in my hosts (sometimes 45%...). Most of the VMs are configured with 2vCPU and are VMs with little load. The extrange thing is that I'm seeing 400 or 500 or 600 as values for the %WAIT parameter!! Is it a bug? I've to read this like 40 or 50 or 60% values? May be I 've to read the %TWAIT or %BWAIT calues insted the %WAIT value? Or may be it's correct. This seems to happen both in ESX 3.0.2 and ESX 3.5. TIA, J Thanks Mike and Rich,vary very interesting.
It was exactly what I was supposing. I’m seeing 20% RDY (average) in my hosts (sometimes 45%…). Most of the VMs are configured with 2vCPU and are VMs with little load.
The extrange thing is that I’m seeing 400 or 500 or 600 as values for the %WAIT parameter!!
Is it a bug? I’ve to read this like 40 or 50 or 60% values? May be I ‘ve to read the %TWAIT or %BWAIT calues insted the %WAIT value?
Or may be it’s correct.
This seems to happen both in ESX 3.0.2 and ESX 3.5.

TIA,
J

]]> By: Mike DiPetrillo http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/comment-page-2/#comment-1395 Mike DiPetrillo Fri, 17 Oct 2008 12:18:45 +0000 http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/#comment-1395 Rich, It does all come down to comfort level and number of VMs. Obviously if you have 40 VMs on a host and 50% of the time they're getting blocked from running you have a problem. Of course if those 40 VMs really weren't doing anything all the time (maybe you have 40 idle print servers or DHCP servers or something) then 50% ready really isn't a big deal. I too used to say anything over 5% ready is bad. I've slowly increased it over time to the 50% threshold. Again, these are my recommendations - not VMware's. You'll have to find something that you're comfortable and as always LOOK and UNDERSTAND your applications. I've seen too many customers that have no clue what they're app is doing or is supposed to be doing and then they want to start troubleshooting at the virtualization layer. Bad idea. Rich,

It does all come down to comfort level and number of VMs. Obviously if you have 40 VMs on a host and 50% of the time they’re getting blocked from running you have a problem. Of course if those 40 VMs really weren’t doing anything all the time (maybe you have 40 idle print servers or DHCP servers or something) then 50% ready really isn’t a big deal. I too used to say anything over 5% ready is bad. I’ve slowly increased it over time to the 50% threshold. Again, these are my recommendations – not VMware’s. You’ll have to find something that you’re comfortable and as always LOOK and UNDERSTAND your applications. I’ve seen too many customers that have no clue what they’re app is doing or is supposed to be doing and then they want to start troubleshooting at the virtualization layer. Bad idea.

]]> By: Mike DiPetrillo http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/comment-page-2/#comment-5443 Mike DiPetrillo Fri, 17 Oct 2008 12:18:00 +0000 http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/#comment-5443 Rich, It does all come down to comfort level and number of VMs. Obviously if you have 40 VMs on a host and 50% of the time they're getting blocked from running you have a problem. Of course if those 40 VMs really weren't doing anything all the time (maybe you have 40 idle print servers or DHCP servers or something) then 50% ready really isn't a big deal. I too used to say anything over 5% ready is bad. I've slowly increased it over time to the 50% threshold. Again, these are my recommendations - not VMware's. You'll have to find something that you're comfortable and as always LOOK and UNDERSTAND your applications. I've seen too many customers that have no clue what they're app is doing or is supposed to be doing and then they want to start troubleshooting at the virtualization layer. Bad idea. Rich,

It does all come down to comfort level and number of VMs. Obviously if you have 40 VMs on a host and 50% of the time they’re getting blocked from running you have a problem. Of course if those 40 VMs really weren’t doing anything all the time (maybe you have 40 idle print servers or DHCP servers or something) then 50% ready really isn’t a big deal. I too used to say anything over 5% ready is bad. I’ve slowly increased it over time to the 50% threshold. Again, these are my recommendations – not VMware’s. You’ll have to find something that you’re comfortable and as always LOOK and UNDERSTAND your applications. I’ve seen too many customers that have no clue what they’re app is doing or is supposed to be doing and then they want to start troubleshooting at the virtualization layer. Bad idea.

]]> By: Rich http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/comment-page-2/#comment-1394 Rich Fri, 17 Oct 2008 12:00:23 +0000 http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/#comment-1394 Interesting recommendation for %ready times. I've always heard / read that double digit ready time was bad (so >10%). As always, it's relative to the application on each VM and the user experience impact. More on this topic at http://communities.vmware.com/docs/DOC-7390. Interesting recommendation for %ready times. I’ve always heard / read that double digit ready time was bad (so >10%). As always, it’s relative to the application on each VM and the user experience impact. More on this topic at http://communities.vmware.com/docs/DOC-7390.

]]> By: rbrambley http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/comment-page-2/#comment-5442 rbrambley Fri, 17 Oct 2008 12:00:00 +0000 http://vmetc.com/2008/09/19/deploying-vmware-in-a-linux-shop-po2575/#comment-5442 Interesting recommendation for %ready times. I've always heard / read that double digit ready time was bad (so >10%). As always, it's relative to the application on each VM and the user experience impact. More on this topic at http://communities.vmware.com/docs/DOC-7390. Interesting recommendation for %ready times. I’ve always heard / read that double digit ready time was bad (so >10%). As always, it’s relative to the application on each VM and the user experience impact. More on this topic at http://communities.vmware.com/docs/DOC-7390.

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