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items: usage of swap on host server
items: Re: usage of swap on host server

usage of swap on host server
type: item
description: does openvz can use the swap partition on the host server for the VE inside it? because i have 2GB RAM and 2GB swap on the host server, then setup 2 VE with 1GB guaranteed RAM and 1.5GB burstable RAM for each VE. it seems that if the 2 VE burst the RAM usage more than 2GB in total, the host didn't use its swap partition to accommodate the burst need as I check the swap partition is always show 0 is it true that i can't use the host swap as RAM for VE? in other word 2GB RAM + 2GB swap != 4GB memory can be allocated for VEs? Best Regards, Markus Send instant messages to your online friends http://uk.messenger.yahoo.com
creator: Markus Hardiyanto
date: 2008-03-12T06:52:45-00:00

Re: usage of swap on host server
type: item
description: Zitat von Markus Hardiyanto <markus.hardiyanto@yahoo.com>: > does openvz can use the swap partition on the host server for the VE > inside it? because i have 2GB RAM and 2GB swap on the host server, > then setup 2 VE with 1GB guaranteed RAM and 1.5GB burstable RAM for > each VE. > > it seems that if the 2 VE burst the RAM usage more than 2GB in > total, the host didn't use its swap partition to accommodate the > burst need as I check the swap partition is always show 0 > > is it true that i can't use the host swap as RAM for VE? in other > word 2GB RAM + 2GB swap != 4GB memory can be allocated for VEs? > > Best Regards, > Markus The VE can use the memory supplied by the hardware node. It does not matter if the HW node uses RAM or SWAP beside performance. If the HW node does not use SWAP you simply have not *used* but maybe only reserved more then 2GB in sum (HW-node + VE). You can check /proc/meminfo on the HW-node to see how much of your RAM is used. Regards Andreas -- All your trash belong to us ;-) www.spamschlucker.org To: stephan@spamschlucker.org
creator: lst_hoe01
date: 2008-03-12T12:14:26-00:00

Re: usage of swap on host server
type: item
description: Markus Hardiyanto wrote: > does openvz can use the swap partition on the host server for the VE > inside it? because i have 2GB RAM and 2GB swap on the host server, > then setup 2 VE with 1GB guaranteed RAM and 1.5GB burstable RAM for > each VE. > > it seems that if the 2 VE burst the RAM usage more than 2GB in total, > the host didn't use its swap partition to accommodate the burst need > as I check the swap partition is always show 0 > > is it true that i can't use the host swap as RAM for VE? in other word > 2GB RAM + 2GB swap != 4GB memory can be allocated for VEs? Host system swap is definitely used then needed. PS in OpenVZ we do not understand terms such as "burstable RAM". Where have you got it from?
creator: kir
date: 2008-03-12T14:27:07-00:00

Re: usage of swap on host server
type: item
description: From: "Kir Kolyshkin" <kir@openvz.org> > PS in OpenVZ we do not understand terms such as "burstable RAM". Where > have you got it from? As far as i know OpenVZ have garanteed and burstable RAM. (Xen does not have burstable RAM). And we use it fine. It also should use the HN's SWAP as additional memory for the VE's Danny.
creator: Danny Terweij
date: 2008-03-12T15:16:24-00:00

Re: usage of swap on host server
type: item
description: the problem is i'm starting to get error: fork: cannot allocate memory, and when it happens apache will show 500 internal server error and wont fix if i'm not stopping and starting it manually. any way to prevent this? I want the RAM allocation for the VE remains the same. Best Regards, Markus ----- Original Message ---- From: Danny Terweij <danny@leto.nettuning.net> To: users@openvz.org Sent: Wednesday, March 12, 2008 23:16:24 Subject: Re: [Users] usage of swap on host server It also should use the HN's SWAP as additional memory for the VE's Send instant messages to your online friends http://uk.messenger.yahoo.com
creator: Markus Hardiyanto
date: 2008-03-13T01:57:42-00:00

Re: usage of swap on host server
type: item
description: Markus, if you plan to have just a few users you may want to reduce the number of processes apache will fork by deault. Take a look at the "StartServers" parameter in the <IfModule prefork.c> section of the httpd.conf file. Good luck -Jerry Quoting Markus Hardiyanto <markus.hardiyanto@yahoo.com>: > the problem is i'm starting to get error: fork: cannot allocate > memory, and when it happens apache will show 500 internal server > error and wont fix if i'm not stopping and starting it manually. any > way to prevent this? I want the RAM allocation for the VE remains > the same. > > Best Regards, > Markus > > ----- Original Message ---- > From: Danny Terweij <danny@leto.nettuning.net> > To: users@openvz.org > Sent: Wednesday, March 12, 2008 23:16:24 > Subject: Re: [Users] usage of swap on host server > > It also should use the HN's SWAP as additional memory for > the VE's > > > > > > Send instant messages to your online friends http://uk.messenger.yahoo.com > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
creator: Jerry Del Rio
date: 2008-03-13T02:16:26-00:00

Re: usage of swap on host server
type: item
description: On 13/03/2008, at 2:57, Markus Hardiyanto wrote: > the problem is i'm starting to get error: fork: cannot allocate > memory, and when it happens apache will show 500 internal server > error and wont fix if i'm not stopping and starting it manually. any > way to prevent this? I want the RAM allocation for the VE remains > the same. > try looking in the file /proc/user_beancounters if there are in the last column (failcnt) positive values (i guess at privvmpages) then go to the wiki and there is the behavior of privvmpages documented, you should set this higher for your VM's best raimund > Best Regards, > Markus > > ----- Original Message ---- > From: Danny Terweij <danny@leto.nettuning.net> > To: users@openvz.org > Sent: Wednesday, March 12, 2008 23:16:24 > Subject: Re: [Users] usage of swap on host server > > It also should use the HN's SWAP as additional memory for > the VE's > > > > > > Send instant messages to your online friends http://uk.messenger.yahoo.com >
creator: Raimund Sacherer
date: 2008-03-13T02:28:58-00:00

Re: usage of swap on host server
type: item
description: Hello Jerry, thanks for your suggestion, but other process also having the same problem, such as firewall and email server. Best Regards, Markus ----- Original Message ---- From: Jerry Del Rio <jdelrio@qunoc.com> To: users@openvz.org; Markus Hardiyanto <markus.hardiyanto@yahoo.com> Sent: Thursday, March 13, 2008 10:16:26 Subject: Re: [Users] usage of swap on host server Markus, if you plan to have just a few users you may want to reduce the number of processes apache will fork by deault. Take a look at the "StartServers" parameter in the <IfModule prefork.c> section of the httpd.conf file. Good luck -Jerry Quoting Markus Hardiyanto <markus.hardiyanto@yahoo.com>: > the problem is i'm starting to get error: fork: cannot allocate > memory, and when it happens apache will show 500 internal server > error and wont fix if i'm not stopping and starting it manually. any > way to prevent this? I want the RAM allocation for the VE remains > the same. > > Best Regards, > Markus > > ----- Original Message ---- > From: Danny Terweij <danny@leto.nettuning.net> > To: users@openvz.org > Sent: Wednesday, March 12, 2008 23:16:24 > Subject: Re: [Users] usage of swap on host server > > It also should use the HN's SWAP as additional memory for > the VE's > > > > > > Send instant messages to your online friends http://uk.messenger.yahoo.com > > _______________________________________________ > Users mailing list > Users@openvz.org > https://openvz.org/mailman/listinfo/users > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. Send instant messages to your online friends http://uk.messenger.yahoo.com
creator: Markus Hardiyanto
date: 2008-03-13T02:51:22-00:00

Re: usage of swap on host server
type: item
description: Markus Hardiyanto a écrit : > the problem is i'm starting to get error: fork: cannot allocate memory, and when it happens apache will show 500 internal server error and wont fix if i'm not stopping and starting it manually. any way to prevent this? I want the RAM allocation for the VE remains the same. > Just to be sure, don't you have some resource limits hit for your VZ (have a look to /proc/user_beancounters)? If so, raising the faulty limit should help. -- Ce message a ete verifie par MailScanner pour des virus ou des polluriels et rien de suspect n'a ete trouve.
creator: Benoit Branciard
date: 2008-03-13T07:19:57-00:00