Thanks to Roland Rebstock and Russell Page. Answer is : "There is no performance gain or loss when booting Solaris to 32 bit or 64bit when running Oracle. The Solaris 64bit O/S will run without any performance issues with 32 bit applications". --- Sebastien DAUBIGNE sdaubigne@bordeaux-bersol.sema.slb.com <mailto:sdaubigne@bordeaux-bersol.sema.slb.com> - (+33)5.57.26.56.36 SchlumbergerSema - SGS/DWH/Pessac -----Message d'origine----- De: sunmanagers-bounces@sunmanagers.org [SMTP:sunmanagers-bounces@sunmanagers.org] @ la place de DAUBIGNE Sebastien - BOR Date: mercredi 14 janvier 2004 11:56 @: sunmanagers@sunmanagers.org Objet: Solaris 8 on sun4u/sun4u1 : 32 or 64 bits As you know, Solaris 8 boots with 64 bits kernel as default when running on E6500/E10K. I would like to hear your opinion on booting 32 bits kernel with theses architectures. An Oracle tech recommended to boot with 32 bits kernel for Oracle 8i (8.1.7.4) 32 bits to perform better. Here is his statement : "Solaris 8 OS 32bits with Oracle 8i 32bits will perform well for you application. There is no reason to run Solaris 8 64bits with Oracle 8i 64 bits, except when you have to exceed 32 bits limits". I could easily understand that Oracle 32bits is sufficient and Oracle 64 bits only necessary when you need very large SGA or such 64 bits-related things. But for Solaris 8, I though that 64 bits kernel was recommended and performed better for all UltraSparc2/UltraSparc3 servers. If not the case, why would Solaris boots the 64 bits kernel as default ? Is this necessary/better to boot 32 bits kernel when no 64 bits apps are running ? Any opinion appreciated. --- Sebastien DAUBIGNE sdaubigne@bordeaux-bersol.sema.slb.com <mailto:sdaubigne@bordeaux-bersol.sema.slb.com> - (+33)5.57.26.56.36 SchlumbergerSema - SGS/DWH/Pessac _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagers _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Mon Jan 19 09:16:13 2004
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