Onconfig Parameter RESIDENT

Hello, IDS 11.10.FC2W4 on Solaris 10, 16 Gb Ram. I have set the onconfig parameter to RESIDENT -1 and SHMTOTAL 0. knowing that shared-memory residency will be enforced for the resident as well as virtual portion and will improve the performance. onstat -g seg shows IBM Informix Dynamic Server Version 11.10.FC2W4 -- On-Line -- Up 1 days 19:34:06 -- 11994112 Kbytes Segment Summary: id key addr size ovhd class blkused blkfree 234881097 52574801 a10a000000 8774483968 103257464 R* 2140914 1294 234881098 52574802 a315000000 2164260864 25364272 V* 167897 360487 234881099 52574803 a396000000 1048576 13552 M 138 118 234881100 52574804 a397000000 268435456 3147376 V 5201 60335 234881101 52574805 a3a7000000 268435456 3147376 V 9372 56164 234881102 52574806 a3b7000000 268435456 3147376 V 34570 30966 234881103 52574807 a3c7000000 268435456 3147376 V 3428 62108 234881104 52574808 a3d7000000 268435456 3147376 V 769 64767 Total: - - 12281970688 - - 2362289 636239 will all the newly added virtual protions also remain in physical RAM. IF yes them may be i would face a memeory exaust issue on more virutal segment addition. --I can set RESIDENT to a value greater than 1 to indicate the number of memory segments to stay in physical memory-- Does it means if i set RESIDENT 4 then along with Resident portion only 4 virtual segments (first 4 Vs ) would be pinned to Physical Ram? Pls advice. Regards vikas.

IB that setting RESIDENT to 4 will make the resident segment and the first three virtual segments (a total of 4) resident in memory. Art On Tue, Aug 26, 2008 at 5:25 AM, VIKAS HIVARKAR <vikas.hivarkar@gmail.com>wrote: > Hello, > > IDS 11.10.FC2W4 on Solaris 10, 16 Gb Ram. > > I have set the onconfig parameter to RESIDENT -1 and SHMTOTAL 0. > knowing that shared-memory residency will be enforced for the resident as > well > as virtual portion and will improve the performance. > > onstat -g seg shows > IBM Informix Dynamic Server Version 11.10.FC2W4 -- On-Line -- Up 1 days > 19:34:06 -- 11994112 Kbytes> > Segment Summary: > id key addr size ovhd class blkused blkfree > 234881097 52574801 a10a000000 8774483968 103257464 R* 2140914 1294 > 234881098 52574802 a315000000 2164260864 25364272 V* 167897 360487 > 234881099 52574803 a396000000 1048576 13552 M 138 118 > 234881100 52574804 a397000000 268435456 3147376 V 5201 60335 > 234881101 52574805 a3a7000000 268435456 3147376 V 9372 56164 > 234881102 52574806 a3b7000000 268435456 3147376 V 34570 30966 > 234881103 52574807 a3c7000000 268435456 3147376 V 3428 62108 > 234881104 52574808 a3d7000000 268435456 3147376 V 769 64767 > Total: - - 12281970688 - - 2362289 636239 > > will all the newly added virtual protions also remain in physical RAM. IF > yes > them may be i would face a memeory exaust issue on more virutal segment > addition. > > --I can set RESIDENT to a value greater than 1 to indicate the number of > memory segments to stay in physical memory-- > > Does it means if i set RESIDENT 4 then along with Resident portion only 4 > virtual segments (first 4 Vs ) would be pinned to Physical Ram? > > Pls advice. > > Regards > vikas. > > > > ******************************************************************************* > Forum Note: Use "Reply" to post a response in the discussion forum. > > -- Art S. Kagel Oninit (www.oninit.com) IIUG Board of Directors (art@iiug.org) Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on my employer, Oninit, the IIUG, nor any other organization with which I am associated either explicitly or implicitly. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves.

Thank you Mr Kagel ! Would setting the RESIDENT 1 be more practical approach with just 16 Gb Ram. pls suggest Regards vikas >IB that setting RESIDENT to 4 will make the resident segment and the first >three virtual segments (a total of 4) resident in memory. >Art >On Tue, Aug 26, 2008 at 5:25 AM, VIKAS HIVARKAR <vikas.hivarkar@gmail.com>>wrote: >> Hello, >> >> IDS 11.10.FC2W4 on Solaris 10, 16 Gb Ram. >> >> I have set the onconfig parameter to RESIDENT -1 and SHMTOTAL 0. >> knowing that shared-memory residency will be enforced for the resident as >> well >> as virtual portion and will improve the performance. >> >> onstat -g seg shows >> IBM Informix Dynamic Server Version 11.10.FC2W4 -- On-Line -- Up 1 days >> 19:34:06 -- 11994112 Kbytes>> >> Segment Summary: >> id key addr size ovhd class blkused blkfree >> 234881097 52574801 a10a000000 8774483968 103257464 R* 2140914 1294 >> 234881098 52574802 a315000000 2164260864 25364272 V* 167897 360487 >> 234881099 52574803 a396000000 1048576 13552 M 138 118 >> 234881100 52574804 a397000000 268435456 3147376 V 5201 60335 >> 234881101 52574805 a3a7000000 268435456 3147376 V 9372 56164 >> 234881102 52574806 a3b7000000 268435456 3147376 V 34570 30966 >> 234881103 52574807 a3c7000000 268435456 3147376 V 3428 62108 >> 234881104 52574808 a3d7000000 268435456 3147376 V 769 64767 >> Total: - - 12281970688 - - 2362289 636239 >> >> will all the newly added virtual protions also remain in physical RAM. IF >> yes >> them may be i would face a memeory exaust issue on more virutal segment >> addition. >> >> --I can set RESIDENT to a value greater than 1 to indicate the number of >> memory segments to stay in physical memory-- >> >> Does it means if i set RESIDENT 4 then along with Resident portion only 4 >> virtual segments (first 4 Vs ) would be pinned to Physical Ram? >> >> Pls advice. >> >> Regards >> vikas. >> >> >> >> ******************************************************************************* >> Forum Note: Use "Reply" to post a response in the discussion forum. >> >> -- >>Art S. Kagel >>Oninit (www.oninit.com) >>IIUG Board of Directors (art@iiug.org)

Given that your server is using 11.256GB of those 16GB of available RAM? Maybe. Is there anything else of significance running on this system that can't live happily in 5GB of memory? If yes, then just make the 8GB resident segment memory resident, as you propose. If not, what are you worried about? As long as you have at least 16GB of swap space available, what can happen? If you are REALLY worried about crowding out the OS or something similarly to be avoided, then set SHMTOTAL to 15GB and reserve 1GB for other things. Of course I have to wonder why a server with close to 8GB of buffer cache and 2GB of initial virtual segment memory is adding another 2.256GB of virtual segments after that. I'd look into that! Art On Tue, Aug 26, 2008 at 9:30 AM, VIKAS HIVARKAR <vikas.hivarkar@gmail.com>wrote: > Thank you Mr Kagel ! > > Would setting the RESIDENT 1 be more practical approach with just 16 Gb > Ram. > pls suggest > > Regards > vikas > > >IB that setting RESIDENT to 4 will make the resident segment and the first > >three virtual segments (a total of 4) resident in memory. > > >Art > > >On Tue, Aug 26, 2008 at 5:25 AM, VIKAS HIVARKAR > <vikas.hivarkar@gmail.com>>wrote: > > >> Hello, > >> > >> IDS 11.10.FC2W4 on Solaris 10, 16 Gb Ram. > >> > >> I have set the onconfig parameter to RESIDENT -1 and SHMTOTAL 0. > >> knowing that shared-memory residency will be enforced for the resident > as > >> well > >> as virtual portion and will improve the performance. > >> > >> onstat -g seg shows > >> IBM Informix Dynamic Server Version 11.10.FC2W4 -- On-Line -- Up 1 days > >> 19:34:06 -- 11994112 Kbytes> >> > >> Segment Summary: > >> id key addr size ovhd class blkused blkfree > >> 234881097 52574801 a10a000000 8774483968 103257464 R* 2140914 1294 > >> 234881098 52574802 a315000000 2164260864 25364272 V* 167897 360487 > >> 234881099 52574803 a396000000 1048576 13552 M 138 118 > >> 234881100 52574804 a397000000 268435456 3147376 V 5201 60335 > >> 234881101 52574805 a3a7000000 268435456 3147376 V 9372 56164 > >> 234881102 52574806 a3b7000000 268435456 3147376 V 34570 30966 > >> 234881103 52574807 a3c7000000 268435456 3147376 V 3428 62108 > >> 234881104 52574808 a3d7000000 268435456 3147376 V 769 64767 > >> Total: - - 12281970688 - - 2362289 636239 > >> > >> will all the newly added virtual protions also remain in physical RAM. > IF > >> yes > >> them may be i would face a memeory exaust issue on more virutal segment > >> addition. > >> > >> --I can set RESIDENT to a value greater than 1 to indicate the number of > >> memory segments to stay in physical memory-- > >> > >> Does it means if i set RESIDENT 4 then along with Resident portion only > 4 > >> virtual segments (first 4 Vs ) would be pinned to Physical Ram? > >> > >> Pls advice. > >> > >> Regards > >> vikas. > >> > >> > >> > >> > > ******************************************************************************* > >> Forum Note: Use "Reply" to post a response in the discussion forum. > >> > >> > > -- > >>Art S. Kagel > >>Oninit (www.oninit.com) > >>IIUG Board of Directors (art@iiug.org) > > > > ******************************************************************************* > Forum Note: Use "Reply" to post a response in the discussion forum. > > -- Art S. Kagel Oninit (www.oninit.com) IIUG Board of Directors (art@iiug.org) Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on my employer, Oninit, the IIUG, nor any other organization with which I am associated either explicitly or implicitly. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves.