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  • Linux查看物理内存信息

    Linux查看物理内存信息

    1. 查看内存大小

    dmidecode|grep Size
    

    输出

    Runtime Size: 64 kB
    ROM Size: 4608 kB
    Installed Size: 1024 kB
    Maximum Size: 1024 kB
    Installed Size: 256 kB
    Maximum Size: 256 kB
    Installed Size: 8192 kB
    Maximum Size: 8192 kB
            PSE (Page size extension)
            PSE-36 (36-bit page size extension)
    Descriptor 7: POST memory resize
    Size: No Module Installed
    Size: 8192 MB
    Range Size: 8 GB
    Size: No Module Installed
    Size: 8192 MB
    Range Size: 8 GB
    Range Size: 16 GB
    
    

    看里面有两个Size的,有两条,一共16G

    2. 查看内存速率

    dmidecode|grep Speed
    
    

    输出

    Nominal Speed: Unknown Or Non-rotating
    Nominal Speed: Unknown Or Non-rotating
    Nominal Speed: Unknown Or Non-rotating
    Speed: Unknown
    Speed: Unknown
    Speed: Unknown
    Max Speed: 3800 MHz
    Current Speed: 3200 MHz
    Speed: Unknown
    Speed: 1600 MHz
    Speed: Unknown
    Speed: 1600 MHz
    
    

    可以看到速率是1600MHz

    3. 查看内存类型

    dmidecode|grep DDR
    

    输出

    Type: DDR3
    Type: DDR3
    
    

    然而,在某些机器上可能没输出,则按照速率来判断。
    内存速率和型号对应关系

    DDR 266/333/400	
    DDR2 533/667/800	
    DDR3 1066/1333/1600	
    
    

    4. 查看ECC内存

    ECC (error-correcting code) RAM is essential in servers and many workstations as it dramatically improves the reliability of the system's memory by detecting common kinds of data corruption and fixing the errors automatically. Without the error correction of ECC memory, memory errors can cause data corruption or even blue screens.
    命令

    dmidecode -t memory
    
    

    输出

    Handle 0x003D, DMI type 17, 27 bytes
    Memory Device
            Array Handle: 0x003B
            Error Information Handle: Not Provided
            Total Width: 72 bits
            Data Width: 64 bits
            Size: 2048 MB
            Form Factor: DIMM
            Set: None
            Locator: DIMM_A1
            Bank Locator: NODE 0 CHANNEL 0 DIMM 0
            Type: Other
            Type Detail: Synchronous
            Speed: 1067 MHz
            Manufacturer: 0x80CE
            Serial Number: 0x875802AD
            Asset Tag: Unknown
            Part Number: M393B5673FH0-CH9  
    
    

    注意,如果信息包含Error Information Handle: Not Provided,Total Width: 72 bits, Data Width: 64 bits则表明ecc是启动的。

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  • 原文地址:https://www.cnblogs.com/wardensky/p/4274180.html
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