https://community.hpe.com/t5/bladesystem-general/bl495c-g6/m-p/4580218#M9200 NUMA = Non-Uniform Memory Architecture, e.g. some region of memory is somehow "better" than others for a particular processor.<BR /><BR />If the memory architecture of this blade is completely uniform (all memory performs equally), then there will be no need for any NUMA configuration data.<BR /><BR />NUMA allows large systems to be used more efficiently, as the OS can be made aware of the properties of the hardware. But it can also be a liability, if the OS and application processing algorithms cannot adapt to the limitations of the hardware. A non-NUMA system can do anything equally well: its performace is simpler to predict. <BR /><BR />A NUMA system may require more tuning and tweaking to get the absolute best performance than an equivalent non-NUMA system, although the SRAT ACPI tables and NUMA features in the OS are aimed to minimize the need of manual tuning.<BR /><BR />MK Mon, 08 Feb 2010 22:23:32 GMT Matti_Kurkela 2010-02-08T22:23:32Z https://community.hpe.com/t5/bladesystem-general/bl495c-g6/m-p/4580217#M9199 we got 2 new blades destined to be LAMP machines. after instalation i look in dmesg and find that log say "No NUMA configuration found".<BR />kernel is 2.6.30.3/vanilla<BR /><BR />compared to other blades with AMD procesor i found that SRAT tables are missing in ACPI data in firmware ROM. <BR />will this be fixed soon? Mon, 08 Feb 2010 18:32:11 GMT https://community.hpe.com/t5/bladesystem-general/bl495c-g6/m-p/4580217#M9199 flirek 2010-02-08T18:32:11Z https://community.hpe.com/t5/bladesystem-general/bl495c-g6/m-p/4580218#M9200 NUMA = Non-Uniform Memory Architecture, e.g. some region of memory is somehow "better" than others for a particular processor.<BR /><BR />If the memory architecture of this blade is completely uniform (all memory performs equally), then there will be no need for any NUMA configuration data.<BR /><BR />NUMA allows large systems to be used more efficiently, as the OS can be made aware of the properties of the hardware. But it can also be a liability, if the OS and application processing algorithms cannot adapt to the limitations of the hardware. A non-NUMA system can do anything equally well: its performace is simpler to predict. <BR /><BR />A NUMA system may require more tuning and tweaking to get the absolute best performance than an equivalent non-NUMA system, although the SRAT ACPI tables and NUMA features in the OS are aimed to minimize the need of manual tuning.<BR /><BR />MK Mon, 08 Feb 2010 22:23:32 GMT https://community.hpe.com/t5/bladesystem-general/bl495c-g6/m-p/4580218#M9200 Matti_Kurkela 2010-02-08T22:23:32Z