Hi Robert,
Thanks for your response:) Actually, I’d like to use tmpfs for ‘tachyon’, which is a ram based distributed file system that employs ramfs in linux-like system. Can I just force the memory usage (including the tmpfs) lower than the physical memory to avoid paging out? -------------------------------------------------------------- Best Regards Haochen Zhang |Briphant Co., Ltd. Tel: 13810051496 | Email: [email protected] Beijing, China Original Message Sender:Robert [email protected] Recipient:[email protected] Date:Tuesday, Nov 10, 2015 23:03 Subject:Re: [smartos-discuss] Disable swap in user zone On 11/10/15 6:32 , Haochen Zhang wrote: Hi all, I’d like to know if I can disable swap in a user zone, just like setting ‘vm.swappiness=0’ in CentOS? Hi, There's no direct analogue of this value in illumos. It's my understanding that setting it to zero on various Linux distributions doesn't actually mean that nothing will get paged out, just reduces the frequency. One of the major differences between Linux and illumos is in this part of the system, in part because mappings always reserve memory from swap such that we can guarantee that if we have to page something out, there is space for it and therefore we don't have to do things like the Linux OOM killer. As such, there's a few different approaches that you can take, but I don't think there's any universal way to guarantee that a user page will never be paged out. Robert ------------------------------------------- smartos-discuss Archives: https://www.listbox.com/member/archive/184463/=now RSS Feed: https://www.listbox.com/member/archive/rss/184463/27557398-e0aa91a4 Modify Your Subscription: https://www.listbox.com/member/? Powered by Listbox: http://www.listbox.com ------------------------------------------- smartos-discuss Archives: https://www.listbox.com/member/archive/184463/=now RSS Feed: https://www.listbox.com/member/archive/rss/184463/25769125-55cfbc00 Modify Your Subscription: https://www.listbox.com/member/?member_id=25769125&id_secret=25769125-7688e9fb Powered by Listbox: http://www.listbox.com
