Hi Nick, ----- "Nick" <list at everywhereinternet.com> escreveu: > Running Centos 5 (32bit)... running a server with 4gb of RAM and it's > shows up as: > > [root at ubercore1 ~]# free > total used free shared buffers > cached > Mem: 3369544 2549668 819876 0 29008 > 2382360 > -/+ buffers/cache: 138300 3231244 > Swap: 6291448 0 6291448 > > I know 4gb is the limit for a 32bit OS but i thought it would be able > to use all of it? Is there another kernel i was supposed to install? I have almost the same issue here :) what I can advice is to take a look on the reserved memory on boot (using dmesg), but I didn't know what can be done to change it. Take a look: ---> CentOS-5.0 (x86_64) on HP-DL380G4 (4GB) [root at Suzuka ~]# dmesg |more Bootdata ok (command line is ro root=/dev/sys/root rhgb quiet) Linux version 2.6.18-8.1.8.el5xen (mockbuild at builder6.centos.org) (gcc version 4 .1.1 20070105 (Red Hat 4.1.1-52)) #1 SMP Tue Jul 10 07:06:45 EDT 2007 <... cut ...> Memory: 3772028k/3933628k available (2321k kernel code, 152780k reserved, 1312k data, 168k init) The "free" command on this machine reports less memory because of Xen. [root at Suzuka ~]# free total used free shared buffers cached Mem: 3032064 3024120 7944 0 15472 313564 -/+ buffers/cache: 2695084 336980 Swap: 4194296 1280636 2913660 But "xentop" reports aprox. 4GB: xentop - 11:02:21 Xen 3.0.3-rc5-8.1.8.el 3 domains: 3 running, 0 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown Mem: 4128324k total, 4127496k used, 828k free CPUs: 4 @ 3400MHz ---> CentOS-4.5 (i386) on SuperMicro MoBo [root at Sakhir ~]# dmesg |more Linux version 2.6.9-55.0.2.ELsmp (mockbuild at builder4.centos.org) (gcc version 3. 4.6 20060404 (Red Hat 3.4.6-8)) #1 SMP Tue Jun 26 14:30:58 EDT 2007 <... cut ...> Memory: 4149888k/4587520k available (1883k kernel code, 42852k reserved, 761k da ta, 188k init, 3276224k highmem) [root at Sakhir ~]# free total used free shared buffers cached Mem: 4151980 4100544 51436 0 233316 1579404 -/+ buffers/cache: 2287824 1864156 Swap: 2104504 192 2104312 I don't know why, but on my HP machine CentOS always recognized less memory, with both CentOS4 and CentOS5 64bits, I had SLES9-x86_64 on that machine and it used all 4GB. And on the SuperMicro with 32bits OS I'm using all 4GB, but didn't try CentOS5 on it yet. Hope this data helps someone on this issue :) Antonio -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Antonio S. Martins Jr. - Support Analist | "Only The Shadow Knows | | Universidade Estadual de Maringá - Brasil| what evil lurks in the | | NPD - Núcleo de Processamento de Dados | Heart of Men!" | | E-Mail: asmartins at uem.br / shadow at uem.br | !!! Linux User: 52392 !!! | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -- Esta mensagem foi verificada pelo sistema de antivírus e acredita-se estar livre de perigo.