Hi guys,
On a amd64 8.1-RELEASE box, I have 2x 2GB RAM sticks and the following in dmesg:
Reading a bit on the web, I came across this and here is the output:
As I can see, the OS is managing only 3 out of 4GB ram (strange since it's the amd64 version of FreeBSD).
So I have a 1GB ram gap.
So far, I was unable to clear the mystery.
The box has ZFS on it .... is it possible that ZFS "reserves" some amount of RAM ? I think this would be too much ....
Anyone ?
On a amd64 8.1-RELEASE box, I have 2x 2GB RAM sticks and the following in dmesg:
Code:
real memory = 4294967296 (4096 MB)
avail memory = 3090038784 (2946 MB)Reading a bit on the web, I came across this and here is the output:
Code:
SYSTEM MEMORY INFORMATION:
mem_wire: 586842112 ( 559MB) [ 18%] Wired: disabled for paging out
mem_active: + 33775616 ( 32MB) [ 1%] Active: recently referenced
mem_inactive:+ 2348044288 ( 2239MB) [ 75%] Inactive: recently not referenced
mem_cache: + 103596032 ( 98MB) [ 3%] Cached: almost avail. for allocation
mem_free: + 35508224 ( 33MB) [ 1%] Free: fully available for allocation
mem_gap_vm: + 524288 ( 0MB) [ 0%] Memory gap: UNKNOWN
-------------- ------------ ----------- ------
mem_all: = 3108290560 ( 2964MB) [100%] Total real memory managed
mem_gap_sys: + 94814208 ( 90MB) Memory gap: Kernel?!
-------------- ------------ -----------
mem_phys: = 3203104768 ( 3054MB) Total real memory available
mem_gap_hw: + 18120704 ( 17MB) Memory gap: Segment Mappings?!
-------------- ------------ -----------
mem_hw: = 3221225472 ( 3072MB) Total real memory installed
SYSTEM MEMORY SUMMARY:
mem_used: 734076928 ( 700MB) [ 22%] Logically used memory
mem_avail: + 2487148544 ( 2371MB) [ 77%] Logically available memory
-------------- ------------ ----------- ------
mem_total: = 3221225472 ( 3072MB) [100%] Logically total memoryAs I can see, the OS is managing only 3 out of 4GB ram (strange since it's the amd64 version of FreeBSD).
Code:
FreeBSD mainserver 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 02:36:49 UTC 2010 root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64So far, I was unable to clear the mystery.
The box has ZFS on it .... is it possible that ZFS "reserves" some amount of RAM ? I think this would be too much ....
Anyone ?