tblader wrote:
John Summerfield wrote:
tblader wrote:
Hello all. I have a centos 4.4 box (2.6.9-42.0.10.ELsmp) with 7gig of ram that doesn't seem to be using swap (also 7gig now). I say "seem" because I've noticed ram utilization run around 95% (with oracle and friends running) and then firing up a couple apps to use that last 5% will stop the machine dead in it's tracks.
What architecture is this beast?
Hope this is is of use.
[2]$ uname -virmop 2.6.9-42.0.10.ELsmp #1 SMP Tue Feb 27 09:40:21 EST 2007 x86_64 x86_64 x86_64 GNU/Linux
[2]$ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 67 model name : AMD Athlon(tm) 64 FX-62 Dual Core Processor stepping : 2 cpu MHz : 2800.038 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 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 lm 3dnowext 3dnow pni cx16 bogomips : 5603.52 TLB size : 1088 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp [4] [5]
processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 67 model name : AMD Athlon(tm) 64 FX-62 Dual Core Processor stepping : 2 cpu MHz : 2800.038 cache size : 1024 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 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 lm 3dnowext 3dnow pni cx16 bogomips : 5599.20 TLB size : 1088 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp [4] [5]
[2]$ cat /proc/meminfo MemTotal: 7128956 kB MemFree: 2132556 kB Buffers: 556832 kB Cached: 2821408 kB
A supplementary question, can anyone explain what "buffers" and "cached" are? I have a performance problem with postgresql (discussion is on the postgresql list), and I see those figures displayed by commands such as free, top and procinfo but the man pages don't define them.