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Obsolete Releases => SME Server 7.x => Topic started by: Franco on July 15, 2009, 04:23:18 AM

Title: New server, 8GB of RAM, SME only sees 3.6GB
Post by: Franco on July 15, 2009, 04:23:18 AM: Hi,
Beating my head searching on centos forums as well. Topic says it all:
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Handle 0x0038 DMI type 20, 19 bytes. Memory Device Mapped Address Starting Address: 0x00000000000 Ending Address: 0x0007FFFFFFF Range Size: 2 GB Physical Device Handle: 0x0037 Memory Array Mapped Address Handle: 0x003F Partition Row Position: 1 Interleave Position: 1 Interleaved Data Depth: 1
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[root@quattor ~]# dmesg | less Linux version 2.6.9-78.0.8.EL (mockbuild@builder16.centos.org) (gcc version 3.4.6 20060404 (Red Hat 3 .4.6-10)) #1 Wed Nov 19 19:43:32 EST 2008 BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) BIOS-e820: 000000000009fc00 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 00000000dfcee000 (usable) BIOS-e820: 00000000dfcee000 - 00000000dfd96000 (ACPI NVS) BIOS-e820: 00000000dfd96000 - 00000000dfdfa000 (usable) BIOS-e820: 00000000dfdfa000 - 00000000dfe5f000 (reserved) BIOS-e820: 00000000dfe5f000 - 00000000dfe68000 (usable) BIOS-e820: 00000000dfe68000 - 00000000dfedf000 (ACPI NVS) BIOS-e820: 00000000dfedf000 - 00000000dfee6000 (usable) BIOS-e820: 00000000dfee6000 - 00000000dfeff000 (ACPI data) BIOS-e820: 00000000dfeff000 - 00000000dff00000 (usable) BIOS-e820: 00000000dff00000 - 00000000e0000000 (reserved) BIOS-e820: 00000000f0000000 - 00000000f4000000 (reserved) BIOS-e820: 00000000fff80000 - 00000000fff8c000 (reserved) BIOS-e820: 0000000100000000 - 0000000220000000 (usable) Warning only 4GB will be used. [b]Use a PAE enabled kernel[/b]. 3200MB HIGHMEM available. 896MB LOWMEM available.
then:
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[root@quattor ~]# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Xeon(R) CPU X3370 @ 3.00GHz stepping : 10 cpu MHz : 2992.560 cache size : 6144 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr [b]pae[/b] mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni tm2 bogomips : 5988.11
Thanks for any advice!
Title: Re: New server, 8GB of RAM, SME only sees 3.6GB
Post by: jokiin on July 15, 2009, 04:36:05 AM: I thought the kernel was only a 32 bit version :???:
Title: Re: New server, 8GB of RAM, SME only sees 3.6GB
Post by: Franco on July 15, 2009, 04:41:12 AM: Quote from: jokiin on July 15, 2009, 04:36:05 AM
I thought the kernel was only a 32 bit version :???:
I'm sure it's 32bit, wiki states 16GB RAM and possibly 64GB with hugemem http://wiki.contribs.org/SME_Server:Documentation:FAQ#Memory_usage_and_limits

Thanks,
Title: Re: New server, 8GB of RAM, SME only sees 3.6GB
Post by: jokiin on July 15, 2009, 04:45:13 AM: ok, I would have expected it to be similar to other 32 bit O/S in regard to memory
Title: Re: New server, 8GB of RAM, SME only sees 3.6GB
Post by: vpurger on July 15, 2009, 06:55:52 AM: Using the wrong kernel, try the SMP kernel.
Title: Re: New server, 8GB of RAM, SME only sees 3.6GB
Post by: cactus on July 15, 2009, 12:55:52 PM: Quote from: vpurger on July 15, 2009, 06:55:52 AM
Using the wrong kernel, try the SMP kernel.
No in this case I think OP should use the hugemem kernel as the SMP kernel is meant for multicore machines.
Title: Re: New server, 8GB of RAM, SME only sees 3.6GB
Post by: vpurger on July 15, 2009, 01:34:16 PM: ... and CPU is Intel Xeon Quad-Core X3370 3.0 GHz CPU !!

Linux version 2.6.9-78.0.22.ELsmp (mockbuild@builder10.centos.org) (gcc version
3.4.6 20060404 (Red Hat 3.4.6-10)) #1 SMP Thu Apr 30 19:14:39 EDT 2009
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009ec00 (usable)
BIOS-e820: 000000000009ec00 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 00000000dfcf0000 (usable)
BIOS-e820: 00000000dfcf0000 - 00000000dfd96000 (ACPI NVS)
BIOS-e820: 00000000dfd96000 - 00000000dfdfd000 (usable)
BIOS-e820: 00000000dfdfd000 - 00000000dfe5f000 (reserved)
BIOS-e820: 00000000dfe5f000 - 00000000dfe6a000 (usable)
BIOS-e820: 00000000dfe6a000 - 00000000dfedf000 (ACPI NVS)
BIOS-e820: 00000000dfedf000 - 00000000dfee7000 (usable)
BIOS-e820: 00000000dfee7000 - 00000000dfeff000 (ACPI data)
BIOS-e820: 00000000dfeff000 - 00000000dff00000 (usable)
BIOS-e820: 00000000dff00000 - 00000000e0000000 (reserved)
BIOS-e820: 00000000f0000000 - 00000000f4000000 (reserved)
BIOS-e820: 00000000fff80000 - 00000000fff8c000 (reserved)
BIOS-e820: 0000000100000000 - 0000000220000000 (usable)
7808MB HIGHMEM available.
896MB LOWMEM available.
found SMP MP-table at 000fd1f0
NX (Execute Disable) protection: active
On node 0 totalpages: 2228224
Title: Re: New server, 8GB of RAM, SME only sees 3.6GB
Post by: Franco on July 15, 2009, 03:14:41 PM: Quote from: vpurger on July 15, 2009, 06:55:52 AM
Using the wrong kernel, try the SMP kernel.
That did it! :)
Quote from: cactus
No in this case I think OP should use the hugemem kernel as the SMP kernel is meant for multicore machines.
According to the wiki, hugemem should be for over 16GB.

Thanks a lot!
Title: Re: New server, 8GB of RAM, SME only sees 3.6GB
Post by: Stefano on July 15, 2009, 03:22:16 PM: Quote from: cactus on July 15, 2009, 12:55:52 PM
No in this case I think OP should use the hugemem kernel as the SMP kernel is meant for multicore machines.

any cpu from P IV is multicore and so, AFAIK, the proper kernel is the smp one..

my 2c
Stefano
Title: Re: New server, 8GB of RAM, SME only sees 3.6GB
Post by: slords on July 15, 2009, 05:25:13 PM: Even if you aren't using multi-core/multi-proc but want to use > 4GB mem you need to use the smp kernel. The standard kernel will only see ~4GB.