各位搞运维的童鞋们，一定经历过服务器要扩容内存，但是需要打各种电话确认服务器的硬件情况，等等等等……
苦恼。。。。。。
忙活半天，原来在linux下是可以直接读取硬件参数来判断的
Linux 查看内存的插槽数，已经使用多少插槽。每条内存多大，已使用内存多大
# dmidecode|grep -P -A5 "Memory\s+Device"|grep Size|grep -v Range Size: 8192 MB Size: 8192 MB Size: 8192 MB Size: No Module Installed Size: No Module Installed Size: No Module Installed Size: 8192 MB Size: 8192 MB Size: 8192 MB Size: No Module Installed Size: No Module Installed Size: No Module Installed
那现在想知道服务器最大能支持的内存，也就是单插糟最大支持多大的内存条
查看内存支持的最大内存容量
# dmidecode|grep -P 'Maximum\s+Capacity' Maximum Capacity: 192 GB
好方便啊，原来linux的基础才是最最最重要的！
那剩下的就是确认内存的类型了
查看内存的频率
# dmidecode|grep -A16 "Memory Device" 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: 1 Locator: DIMM_A1 Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Registered (Buffered) Speed: 1333 MHz Manufacturer: 00AD00B380AD Serial Number: 1F8511F2 Asset Tag: 01122063 Part Number: HMT31GR7CFR4A-H9 -- 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: 1 Locator: DIMM_A2 Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Registered (Buffered) Speed: 1333 MHz Manufacturer: 00AD00B380AD Serial Number: 20450574 Asset Tag: 01122063 Part Number: HMT31GR7CFR4A-H9 -- 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: DIMM_A3 Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Registered (Buffered) Speed: 1333 MHz Manufacturer: 00AD00B380AD Serial Number: 1F351229 Asset Tag: 01122063 Part Number: HMT31GR7CFR4A-H9 -- 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: 2 Locator: DIMM_A4 Bank Locator: Not Specified Type: DDR3 Type Detail: Synchronous Speed: Unknown Manufacturer: Serial Number: Asset Tag: Part Number: --
但一般我们只需要知道内存条的频率就可以了
# dmidecode|grep -A16 "Memory Device"|grep 'Speed' Speed: 1333 MHz Speed: 1333 MHz Speed: 1333 MHz Speed: Unknown Speed: Unknown Speed: Unknown Speed: 1333 MHz Speed: 1333 MHz Speed: 1333 MHz Speed: Unknown Speed: Unknown Speed: Unknown
以上为个人需要在网络上查找的，也充分认识到个人在Linux基础的匮乏。。。。。惭愧！！！！