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Only half my 64G memory can be used in Ubuntu
Usable ram is half of total memory4GB out of 8GB total reserved 64bit 12.04 whyCan't find where memory is being usedUbuntu system Does not see ram16.04LTS 64bit sees only 3.5GB of memory out of 8GB16.04LTS 64bit sees only 3.9GB of memory out of 8GBX370: Only half of my memory is availableimageJ change memory used18.04 Server USB 3.0 and eSataUbuntu(16.04.5) Memory is used more than 97%. Why it is used so much memory?
I just bought a second-hand server(Dell R410), which has 64GB(8 x 8GB)
Memory.
After I formatted all the system, and installed Ubuntu 18.04 Server Version (64bit)
. Only 24GB have been listed in system and can be used.
//free -mh
total used
Mem: 23G 7.7G
Swap: 8.0G 1.8G
However, all the 8 memories are recognized by the system, and here is the info from 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 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2CA0A8E2
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2A70C01A
Asset Tag: 0109401D
Part Number: HMT31GR7AFR4C-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 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2C40A8D7
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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_A4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2A20C022
Asset Tag: 0109401D
Part Number: HMT31GR7AFR4C-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: 5
Locator: DIMM_B1
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 32B17837
Asset Tag: 0110121D
Part Number: HMT31GR7AFR4C-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: 6
Locator: DIMM_B2
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2C40A8E0
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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: 6
Locator: DIMM_B3
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2270025F
Asset Tag: 0109391D
Part Number: HMT31GR7AFR4C-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: 4
Locator: DIMM_B4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 15C1C42F
Asset Tag: 0109391D
Part Number: HMT31GR7AFR4C-H9
What can I do to use all the 64GB memory instead of 24GB? Is Ubuntu 18.08 support more than 64GB memory?
18.04 ram
add a comment |
I just bought a second-hand server(Dell R410), which has 64GB(8 x 8GB)
Memory.
After I formatted all the system, and installed Ubuntu 18.04 Server Version (64bit)
. Only 24GB have been listed in system and can be used.
//free -mh
total used
Mem: 23G 7.7G
Swap: 8.0G 1.8G
However, all the 8 memories are recognized by the system, and here is the info from 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 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2CA0A8E2
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2A70C01A
Asset Tag: 0109401D
Part Number: HMT31GR7AFR4C-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 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2C40A8D7
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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_A4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2A20C022
Asset Tag: 0109401D
Part Number: HMT31GR7AFR4C-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: 5
Locator: DIMM_B1
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 32B17837
Asset Tag: 0110121D
Part Number: HMT31GR7AFR4C-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: 6
Locator: DIMM_B2
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2C40A8E0
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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: 6
Locator: DIMM_B3
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2270025F
Asset Tag: 0109391D
Part Number: HMT31GR7AFR4C-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: 4
Locator: DIMM_B4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 15C1C42F
Asset Tag: 0109391D
Part Number: HMT31GR7AFR4C-H9
What can I do to use all the 64GB memory instead of 24GB? Is Ubuntu 18.08 support more than 64GB memory?
18.04 ram
1
Can you try and remove the RAM modules, maybe clean the sockets with compressed air and put the modules back in? You can also try swapping them around so that they're in a different order. I am not sure why, but this has reportedly solved problems like yours numerous times already.
– Byte Commander
Dec 20 '18 at 19:41
@user535733 The release is Ubuntu 18.04.1
– ppn029012
Dec 22 '18 at 6:48
1
max memory for Linux is shown withsudo apt-get install dmidecode
and thensudo dmidecode -t 16
– Rinzwind
Dec 22 '18 at 7:05
add a comment |
I just bought a second-hand server(Dell R410), which has 64GB(8 x 8GB)
Memory.
After I formatted all the system, and installed Ubuntu 18.04 Server Version (64bit)
. Only 24GB have been listed in system and can be used.
//free -mh
total used
Mem: 23G 7.7G
Swap: 8.0G 1.8G
However, all the 8 memories are recognized by the system, and here is the info from 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 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2CA0A8E2
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2A70C01A
Asset Tag: 0109401D
Part Number: HMT31GR7AFR4C-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 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2C40A8D7
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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_A4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2A20C022
Asset Tag: 0109401D
Part Number: HMT31GR7AFR4C-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: 5
Locator: DIMM_B1
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 32B17837
Asset Tag: 0110121D
Part Number: HMT31GR7AFR4C-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: 6
Locator: DIMM_B2
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2C40A8E0
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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: 6
Locator: DIMM_B3
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2270025F
Asset Tag: 0109391D
Part Number: HMT31GR7AFR4C-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: 4
Locator: DIMM_B4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 15C1C42F
Asset Tag: 0109391D
Part Number: HMT31GR7AFR4C-H9
What can I do to use all the 64GB memory instead of 24GB? Is Ubuntu 18.08 support more than 64GB memory?
18.04 ram
I just bought a second-hand server(Dell R410), which has 64GB(8 x 8GB)
Memory.
After I formatted all the system, and installed Ubuntu 18.04 Server Version (64bit)
. Only 24GB have been listed in system and can be used.
//free -mh
total used
Mem: 23G 7.7G
Swap: 8.0G 1.8G
However, all the 8 memories are recognized by the system, and here is the info from 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 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2CA0A8E2
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2A70C01A
Asset Tag: 0109401D
Part Number: HMT31GR7AFR4C-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 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2C40A8D7
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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_A4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2A20C022
Asset Tag: 0109401D
Part Number: HMT31GR7AFR4C-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: 5
Locator: DIMM_B1
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 32B17837
Asset Tag: 0110121D
Part Number: HMT31GR7AFR4C-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: 6
Locator: DIMM_B2
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD00B380AD
Serial Number: 2C40A8E0
Asset Tag: 01102461
Part Number: HMT31GR7AFR4C-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: 6
Locator: DIMM_B3
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 2270025F
Asset Tag: 0109391D
Part Number: HMT31GR7AFR4C-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: 4
Locator: DIMM_B4
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous Registered (Buffered)
Speed: 1333 MT/s
Manufacturer: 00AD009780AD
Serial Number: 15C1C42F
Asset Tag: 0109391D
Part Number: HMT31GR7AFR4C-H9
What can I do to use all the 64GB memory instead of 24GB? Is Ubuntu 18.08 support more than 64GB memory?
18.04 ram
18.04 ram
edited Dec 22 '18 at 6:48
ppn029012
asked Dec 20 '18 at 19:36
ppn029012ppn029012
1062
1062
1
Can you try and remove the RAM modules, maybe clean the sockets with compressed air and put the modules back in? You can also try swapping them around so that they're in a different order. I am not sure why, but this has reportedly solved problems like yours numerous times already.
– Byte Commander
Dec 20 '18 at 19:41
@user535733 The release is Ubuntu 18.04.1
– ppn029012
Dec 22 '18 at 6:48
1
max memory for Linux is shown withsudo apt-get install dmidecode
and thensudo dmidecode -t 16
– Rinzwind
Dec 22 '18 at 7:05
add a comment |
1
Can you try and remove the RAM modules, maybe clean the sockets with compressed air and put the modules back in? You can also try swapping them around so that they're in a different order. I am not sure why, but this has reportedly solved problems like yours numerous times already.
– Byte Commander
Dec 20 '18 at 19:41
@user535733 The release is Ubuntu 18.04.1
– ppn029012
Dec 22 '18 at 6:48
1
max memory for Linux is shown withsudo apt-get install dmidecode
and thensudo dmidecode -t 16
– Rinzwind
Dec 22 '18 at 7:05
1
1
Can you try and remove the RAM modules, maybe clean the sockets with compressed air and put the modules back in? You can also try swapping them around so that they're in a different order. I am not sure why, but this has reportedly solved problems like yours numerous times already.
– Byte Commander
Dec 20 '18 at 19:41
Can you try and remove the RAM modules, maybe clean the sockets with compressed air and put the modules back in? You can also try swapping them around so that they're in a different order. I am not sure why, but this has reportedly solved problems like yours numerous times already.
– Byte Commander
Dec 20 '18 at 19:41
@user535733 The release is Ubuntu 18.04.1
– ppn029012
Dec 22 '18 at 6:48
@user535733 The release is Ubuntu 18.04.1
– ppn029012
Dec 22 '18 at 6:48
1
1
max memory for Linux is shown with
sudo apt-get install dmidecode
and then sudo dmidecode -t 16
– Rinzwind
Dec 22 '18 at 7:05
max memory for Linux is shown with
sudo apt-get install dmidecode
and then sudo dmidecode -t 16
– Rinzwind
Dec 22 '18 at 7:05
add a comment |
1 Answer
1
active
oldest
votes
It works after I clean the memories slot. It might be caused by the bad contact of hardwares.
add a comment |
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It works after I clean the memories slot. It might be caused by the bad contact of hardwares.
add a comment |
It works after I clean the memories slot. It might be caused by the bad contact of hardwares.
add a comment |
It works after I clean the memories slot. It might be caused by the bad contact of hardwares.
It works after I clean the memories slot. It might be caused by the bad contact of hardwares.
answered 5 hours ago
ppn029012ppn029012
1062
1062
add a comment |
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1
Can you try and remove the RAM modules, maybe clean the sockets with compressed air and put the modules back in? You can also try swapping them around so that they're in a different order. I am not sure why, but this has reportedly solved problems like yours numerous times already.
– Byte Commander
Dec 20 '18 at 19:41
@user535733 The release is Ubuntu 18.04.1
– ppn029012
Dec 22 '18 at 6:48
1
max memory for Linux is shown with
sudo apt-get install dmidecode
and thensudo dmidecode -t 16
– Rinzwind
Dec 22 '18 at 7:05