Memory imformation using dmidecode on Linux

There are times when we would need to increase the physical memory of our Oracle server, or the NameNode of a Hadoop cluster. To do that, we would need to know the maximum memory that can be added to the server, and the available slots/banks.

dmidecode gives all the information that is needed to do exactly that.

dmidecode give us information like the
Size: 4096 MB, etc.
Form Factor eg. DIMM, LRDIMM, Micro-DIMM, etc.
Locator eg DIMM01, DIMM02, etc.
Bank Locator eg. BANK01, BANK02, etc.
Speed eg. 800 MHz, 333 MHz, etc.
Manufacturer eg. Hynix, 014F00000000, etc.

Below we see that the Linux system can have a Maximum Capacity of 288 GB and has 18 Memory banks (highlighted in green).
 Currently the system is using 16 of the banks, and each bank has 4 GB of DIMM (highlighted in yellow).
ie. Current Total Memory = 4 GB x 16 = 64 GB

The banks highlighted with red are the once that aren't being used by the system. So we know that to achieve the Maximum capacity we need 16 GB DIMMs in each of the 18 banks.
ie. 16 GB x 18 = 288 GB

[root@isvx3 match]# dmidecode > dmidecode.out

Below is the Memory/DMI information from the dmidecode output redirected to dmidecode.out

Handle 0x0009, DMI type 16, 15 bytes Physical Memory Array     Location: System Board Or Motherboard     Use: System Memory     Error Correction Type: Single-bit ECC     Maximum Capacity: 288 GB     Error Information Handle: Not Provided     Number Of Devices: 18 Handle 0x000A, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM01     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x000B, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM01     Bank Locator: BANK01     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 72DC350E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x000C, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM02     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x000D, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM02     Bank Locator: BANK02     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 53DCC50E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x000E, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM03     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x000F, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM03     Bank Locator: BANK03     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 5DDC250E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x0010, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM04     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x0011, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM04     Bank Locator: BANK04     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 71DC950E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x0012, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM05     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x0013, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM05     Bank Locator: BANK05     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 60DC350E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x0014, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM06     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x0015, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM06     Bank Locator: BANK06     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 44DC950E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x0016, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM07     Bank Connections: 0 0     Current Speed: Unknown     Type: None     Installed Size: Not Installed     Enabled Size: Not Installed     Error Status: OK Handle 0x0017, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: Unknown     Data Width: Unknown     Size: No Module Installed     Form Factor: Unknown     Set: None     Locator: DIMM07     Bank Locator: BANK07     Type: Unknown     Type Detail: Unknown     Speed: Unknown     Manufacturer: Not Specified     Serial Number: Not Specified     Asset Tag: Not Specified     Part Number: Not Specified Handle 0x0018, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM08     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x0019, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM08     Bank Locator: BANK08     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 54DC150E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x001A, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM09     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x001B, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM09     Bank Locator: BANK09     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 41DCA50E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x001C, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM10     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x001D, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM10     Bank Locator: BANK10     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 5DDC350E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x001E, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM11     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x001F, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM11     Bank Locator: BANK11     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 70DC650E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x0020, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM12     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x0021, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM12     Bank Locator: BANK12     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 5EDC850E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x0022, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM13     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x0023, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM13     Bank Locator: BANK13     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 47DCB50E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x0024, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM14     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x0025, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM14     Bank Locator: BANK14     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 45DC150E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x0026, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM15     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x0027, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM15     Bank Locator: BANK15     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 42DC250E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x0028, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM16     Bank Connections: 0 0     Current Speed: Unknown     Type: None     Installed Size: Not Installed     Enabled Size: Not Installed     Error Status: OK Handle 0x0029, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: Unknown     Data Width: Unknown     Size: No Module Installed     Form Factor: Unknown     Set: None     Locator: DIMM16     Bank Locator: BANK16     Type: Unknown     Type Detail: Unknown     Speed: Unknown     Manufacturer: Not Specified     Serial Number: Not Specified     Asset Tag: Not Specified     Part Number: Not Specified Handle 0x002A, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM17     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x002B, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM17     Bank Locator: BANK17     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 60DC150E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9 Handle 0x002C, DMI type 6, 12 bytes Memory Module Information     Socket Designation: DIMM18     Bank Connections: 0 0     Current Speed: 1 ns     Type: DIMM     Installed Size: 4096 MB (Single-bank Connection)     Enabled Size: 4096 MB (Single-bank Connection)     Error Status: OK Handle 0x002D, DMI type 17, 27 bytes Memory Device     Array Handle: 0x0009     Error Information Handle: Not Provided     Total Width: 72 bits     Data Width: 64 bits     Size: 4096 MB     Form Factor: DIMM     Set: None     Locator: DIMM18     Bank Locator: BANK18     Type: Other     Type Detail: Unknown     Speed: 800 MHz     Manufacturer: Hynix     Serial Number: 53DC950E     Asset Tag: Unknown     Part Number: HMT151R7BFR4C-H9