is my centOS install 64 bit or not?

sneakyimp · 10-03-2007, 11:48 PM

So I just asked my hosting provider to set up a new, faster machine because the old one was struggling under load. Aside from not installing sysstat as promised, they appear to have ignored my request for a 4GB swap. Can anyone verify that my swap is in fact 1GB here? Sorry...i'm kind of a noob:

Code:

[root@server2 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda6              61G  1.1G   56G   2% /
/dev/sda1             236M   14M  211M   6% /boot
tmpfs                 996M     0  996M   0% /dev/shm
/dev/sda3              61G  210M   57G   1% /var
/dev/sda5             966M   18M  899M   2% /tmp
/dev/sda7              59G  181M   56G   1% /home
/dev/sdb1             184G  188M  174G   1% /mysql
/dev/sdc1             184G  188M  174G   1% /backup

More importantly, I want to know if the centOS 5 that's installed is 64 bit or 32 bit (and whether it matters?). Here's the uname output:

Code:

[root@server2 ~]# uname -a
Linux server2.mydomain.com 2.6.20.1 #12 SMP Fri May 18 19:03:50 EDT 2007 i686 athlon i386 GNU/Linux

and here's the cpuinfo...anybody know what chip this might be? it's a dual-core Athlon 4200+ but I'm wondering what family:

Code:

[root@server2 ~]# cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 75
model name      : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+
stepping        : 2
cpu MHz         : 2204.705
cache size      : 512 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8legacy ts fid vid ttp tm stc
bogomips        : 4412.82
clflush size    : 64

processor       : 1
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 75
model name      : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+
stepping        : 2
cpu MHz         : 2204.705
cache size      : 512 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8legacy ts fid vid ttp tm stc
bogomips        : 4409.26
clflush size    : 64

theriddle · 10-04-2007, 12:22 AM

Quote:

Originally Posted by sneakyimp

So I just asked my hosting provider to set up a new, faster machine because the old one was struggling under load. Aside from not installing sysstat as promised, they appear to have ignored my request for a 4GB swap. Can anyone verify that my swap is in fact 1GB here? Sorry...i'm kind of a noob:

Code:

[root@server2 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda6              61G  1.1G   56G   2% /
/dev/sda1             236M   14M  211M   6% /boot
tmpfs                 996M     0  996M   0% /dev/shm
/dev/sda3              61G  210M   57G   1% /var
/dev/sda5             966M   18M  899M   2% /tmp
/dev/sda7              59G  181M   56G   1% /home
/dev/sdb1             184G  188M  174G   1% /mysql
/dev/sdc1             184G  188M  174G   1% /backup

"df" doesn't list swap (it's not a mounted disk.)

Quote:

Originally Posted by sneakyimp

More importantly, I want to know if the centOS 5 that's installed is 64 bit or 32 bit (and whether it matters?). Here's the uname output:

Code:

[root@server2 ~]# uname -a
Linux server2.mydomain.com 2.6.20.1 #12 SMP Fri May 18 19:03:50 EDT 2007 i686 athlon i386 GNU/Linux

The code after the date (Fri May 18 19:03:50 EDT 2007) says it all. You are using an i686, not x86_64 (64bit).

Quote:

Originally Posted by sneakyimp

and here's the cpuinfo...anybody know what chip this might be? it's a dual-core Athlon 4200+ but I'm wondering what family:

Code:

[root@server2 ~]# cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 75
model name      : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+
stepping        : 2
cpu MHz         : 2204.705
cache size      : 512 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8legacy ts fid vid ttp tm stc
bogomips        : 4412.82
clflush size    : 64

processor       : 1
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 75
model name      : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+
stepping        : 2
cpu MHz         : 2204.705
cache size      : 512 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8legacy ts fid vid ttp tm stc
bogomips        : 4409.26
clflush size    : 64

You are using an AMD Athlon(tm) 64 X2 Dual Core Processor 4200+. Yes, it is a dual core 64bit AMD Athlon.

sneakyimp · 10-04-2007, 01:17 AM

thanks riddle!

i tried 'free' and apparently i do have 4GB swap. should have thought of that before.

Code:

[root@server2 ~]# free -m
             total       used       free     shared    buffers     cached
Mem:          1991        379       1611          0         64        269
-/+ buffers/cache:         45       1946
Swap:         3914          0       3914

so now i'm wondering what the heck this line means:

Code:

tmpfs                 996M     0  996M   0% /dev/shm

Finally, I'm wondering if I should demand 64-bit linux or if that would just be shooting myself in the foot. Is there any advantage to 64 bit? How might it affect apache/php/mysql?