Re: [zones-discuss] Difference between capped.memory and zone.max-shm-memory
capped.memory is about the total memory e.g *Add a memory cap.* zonecfg:my-zone *add capped-memory* 1. *Set the memory cap.* zonecfg:my-zone:capped-memory *set physical=50m* 2. *Set the swap memory cap.* zonecfg:my-zone:capped-memory *set swap=100m* 3. *Set the locked memory cap.* zonecfg:my-zone:capped-memory *set locked=30m* and zone.max-shm-memory is about the sysV IPC total shard memory shmsys:shminfo_shmmax* e.g. control oracle db on shared memory usage On 4/18/2012 8:52 AM, Jordi Espasa Clofent wrote: Hi all, I just want to know what's the difference between capped.memory and zone.max-shm-memory when it comes to limit the zones access to the available RAM memory in the global zone. According to here http://docs.oracle.com/cd/E18752_01/html/817-1592/z.config.ov-3.html#gepte: Solaris 10 8/07: Physical Memory Control and the capped-memory Resource The capped-memory resource sets limits for physical, swap, and locked memory. Each limit is optional, but at least one must be set. Determine values for this resource if you plan to cap memory for the zone by using rcapd from the global zone. The physical property of the capped-memory resource is used by rcapd as the max-rss value for the zone. The swap property of the capped-memory resource is the preferred way to set the zone.max-swap resource control. The locked property of the capped-memory resource is the preferred way to set the zone.max-locked-memory resource control. So... Are the both parameters doing the same (limiting the amount of available RAm for the zone) but just using different tools (rcapd for capped.memory and prctl for zone.max-shm-memory)? What I really want to know is how to limit totally the memory in the zones. Let's say I have a global zone with 10GB and I want to create 2 zones with ONLY 2GB at maximum, whatever they want or ask for. Thanks in advance. -- Hung-Sheng Tsao Ph D. Founder Principal HopBit GridComputing LLC cell: 9734950840 http://laotsao.blogspot.com/ http://laotsao.wordpress.com/ http://blogs.oracle.com/hstsao/ attachment: laotsao.vcf___ zones-discuss mailing list zones-discuss@opensolaris.org
Re: [zones-discuss] Difference between capped.memory and zone.max-shm-memory
Ok. So then I understand: - before Solaris 10 Update 7 (the one with SUNWrcapu, rcapd) there is no real way to limit the amount of RAM that a zone can borrow from the global one. Is that correct? Thanks again. -- I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain. ___ zones-discuss mailing list zones-discuss@opensolaris.org
Re: [zones-discuss] Difference between capped.memory and zone.max-shm-memory
rcapd is introduced on s10 8/07 s10u4 Sent from my iPad On Apr 18, 2012, at 10:34, Jordi Espasa Clofent jespa...@minibofh.org wrote: Ok. So then I understand: - before Solaris 10 Update 7 (the one with SUNWrcapu, rcapd) there is no real way to limit the amount of RAM that a zone can borrow from the global one. Is that correct? Thanks again. -- I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain. ___ zones-discuss mailing list zones-discuss@opensolaris.org
Re: [zones-discuss] Difference between capped.memory and zone.max-shm-memory
hi may be one could add in solaris resource control used to be project based one need to setup project and limit the resoure pool then assign the poll to zone. it is not easy to use . since then many shortcut for resource pool control are added to zonecfg make it very easy to add resource control inside the zone Sent from my iPad On Apr 18, 2012, at 11:25, Hung-Sheng Tsao (LaoTsao) Ph.D laot...@gmail.com wrote: rcapd is introduced on s10 8/07 s10u4 Sent from my iPad On Apr 18, 2012, at 10:34, Jordi Espasa Clofent jespa...@minibofh.org wrote: Ok. So then I understand: - before Solaris 10 Update 7 (the one with SUNWrcapu, rcapd) there is no real way to limit the amount of RAM that a zone can borrow from the global one. Is that correct? Thanks again. -- I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain. ___ zones-discuss mailing list zones-discuss@opensolaris.org
Re: [zones-discuss] Difference between capped.memory and zone.max-shm-memory
El 2012-04-18 19.22, Hung-Sheng Tsao (LaoTsao) Ph.D escribió: hi may be one could add in solaris resource control used to be project based one need to setup project and limit the resoure pool then assign the poll to zone. it is not easy to use . since then many shortcut for resource pool control are added to zonecfg make it very easy to add resource control inside the zone The cuestion sill, more or less, there: It is possible to limit the amout of RAM that a zone can borrow from the global zone without rcapd? As far as I can understand, if a zone only uses zone.max-shm-memory instead, potencially can borrow all the available RAM. So? -- I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain. ___ zones-discuss mailing list zones-discuss@opensolaris.org
Re: [zones-discuss] Difference between capped.memory and zone.max-shm-memory
On 04/18/12 02:42 PM, Jordi Espasa Clofent wrote: El 2012-04-18 19.22, Hung-Sheng Tsao (LaoTsao) Ph.D escribió: hi may be one could add in solaris resource control used to be project based one need to setup project and limit the resoure pool then assign the poll to zone. it is not easy to use . since then many shortcut for resource pool control are added to zonecfg make it very easy to add resource control inside the zone The cuestion sill, more or less, there: It is possible to limit the amout of RAM that a zone can borrow from the global zone without rcapd? Without rcapd, it is only possible to limit certain types of ram usage: - zone.max-shm-memory: limits ram used by sysV mappings. - zone.max-locked-memory: limits ram used by locked mappings (mlock, ISM, DISM). Both of these do not limit ram used by other means, such as text pages, mapped files, and anonymous memory (like malloc()'ed memory) As far as I can understand, if a zone only uses zone.max-shm-memory instead, potencially can borrow all the available RAM. So? Correct. In this case, only memory used by sysV mappings (shmget(2), shmat(2) is limited. -Steve L. ___ zones-discuss mailing list zones-discuss@opensolaris.org
Re: [zones-discuss] Difference between capped.memory and zone.max-shm-memory
On 04/18/12 16:42, Jordi Espasa Clofent wrote: El 2012-04-18 19.22, Hung-Sheng Tsao (LaoTsao) Ph.D escribió: hi may be one could add in solaris resource control used to be project based one need to setup project and limit the resoure pool then assign the poll to zone. it is not easy to use . since then many shortcut for resource pool control are added to zonecfg make it very easy to add resource control inside the zone The cuestion sill, more or less, there: It is possible to limit the amout of RAM that a zone can borrow from the global zone without rcapd? As far as I can understand, if a zone only uses zone.max-shm-memory instead, potencially can borrow all the available RAM. So? zone.max-swap can be used to limit the amount of memory that processes in a zone can reserve. Note that this has little to do with swap devices - the term swap in this sense means virtual memory. In order for a process to use RAM, those pages of RAM need to be backed by something that can be paged. Anonymous pages (those typically obtained via malloc()) are charged against malloc. The memory needed to hold executables and libraries are backed by the disk where they reside. -- Mike Gerdts Solaris Core OS / Zones http://blogs.oracle.com/zoneszone/ ___ zones-discuss mailing list zones-discuss@opensolaris.org
