Centos6
dmidecode 顯示 6 * 8GB DIMM 但 free -m 只顯示 16GB？
我在 HP ProLiant BL460c G7 刀片伺服器上執行 CentOS 6.4。我在 HP 刀片伺服器上安裝了 6 * 8GB DIMM 記憶體。
當我使用 dmidecode –type memory 時，我得到以下輸出
Handle 0x1000, DMI type 16, 23 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: Single-bit ECC Maximum Capacity: 192 GB Error Information Handle: Not Provided Number Of Devices: 6 Handle 0x1001, DMI type 16, 23 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: Single-bit ECC Maximum Capacity: 192 GB Error Information Handle: Not Provided Number Of Devices: 6 Handle 0x1100, DMI type 17, 34 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: No Module Installed Form Factor: DIMM Set: 1 Locator: PROC 1 DIMM 1D Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: Unknown Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: Unknown Configured Clock Speed: Unknown Handle 0x1101, DMI type 17, 34 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 8192 MB Form Factor: DIMM Set: 2 Locator: PROC 1 DIMM 2A Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: 1333 MHz Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: 2 Configured Clock Speed: 1333 MHz Handle 0x1102, DMI type 17, 34 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: No Module Installed Form Factor: DIMM Set: 3 Locator: PROC 1 DIMM 3E Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: Unknown Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: Unknown Configured Clock Speed: Unknown Handle 0x1103, DMI type 17, 34 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 8192 MB Form Factor: DIMM Set: 4 Locator: PROC 1 DIMM 4B Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: 1333 MHz Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: 2 Configured Clock Speed: 1333 MHz Handle 0x1104, DMI type 17, 34 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: No Module Installed Form Factor: DIMM Set: 5 Locator: PROC 1 DIMM 5F Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: Unknown Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: Unknown Configured Clock Speed: Unknown Handle 0x1105, DMI type 17, 34 bytes Memory Device Array Handle: 0x1000 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 8192 MB Form Factor: DIMM Set: 6 Locator: PROC 1 DIMM 6C Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: 1333 MHz Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: 2 Configured Clock Speed: 1333 MHz Handle 0x1106, DMI type 17, 34 bytes Memory Device Array Handle: 0x1001 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: No Module Installed Form Factor: DIMM Set: 7 Locator: PROC 2 DIMM 1D Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: Unknown Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: Unknown Configured Clock Speed: Unknown Handle 0x1107, DMI type 17, 34 bytes Memory Device Array Handle: 0x1001 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 8192 MB Form Factor: DIMM Set: 8 Locator: PROC 2 DIMM 2A Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: 1333 MHz Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: 2 Configured Clock Speed: 1333 MHz Handle 0x1108, DMI type 17, 34 bytes Memory Device Array Handle: 0x1001 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: No Module Installed Form Factor: DIMM Set: 9 Locator: PROC 2 DIMM 3E Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: Unknown Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: Unknown Configured Clock Speed: Unknown Handle 0x1109, DMI type 17, 34 bytes Memory Device Array Handle: 0x1001 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 8192 MB Form Factor: DIMM Set: 10 Locator: PROC 2 DIMM 4B Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: 1333 MHz Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: 2 Configured Clock Speed: 1333 MHz Handle 0x110A, DMI type 17, 34 bytes Memory Device Array Handle: 0x1001 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: No Module Installed Form Factor: DIMM Set: 11 Locator: PROC 2 DIMM 5F Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: Unknown Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: Unknown Configured Clock Speed: Unknown Handle 0x110B, DMI type 17, 34 bytes Memory Device Array Handle: 0x1001 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 8192 MB Form Factor: DIMM Set: 12 Locator: PROC 2 DIMM 6C Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: 1333 MHz Manufacturer: Not Specified Serial Number: Not Specified Asset Tag: Not Specified Part Number: Not Specified Rank: 2 Configured Clock Speed: 1333 MHz但是當我輸入 free -m 時，它只顯示 16GB。我不明白這裡有什麼問題。請幫忙。
total used free shared buffers cached Mem: 15914 4697 11216 0 226 3385 -/+ buffers/cache: 1085 14828 Swap: 18095 52 18043
您必須使用 64 位系統來處理這麼多的主記憶體。您能夠處理超過約 4G 的任何內容這一事實要歸功於 PAE，這是一種在邏輯上擴展 32 位系統的記憶體映射的方法。如您所見，它不會擴展很遠。
因此，使用 amd64 發行版重新安裝，您將能夠處理剩餘的記憶體。