What is inactive memory in Linux?

Inactive memory is memory that was allocated to a process that is no longer running.

How do I reclaim inactive memory in Linux?

Every Linux System has three options to clear cache without interrupting any processes or services.

  1. Clear PageCache only. # sync; echo 1 > /proc/sys/vm/drop_caches.
  2. Clear dentries and inodes. # sync; echo 2 > /proc/sys/vm/drop_caches.
  3. Clear pagecache, dentries, and inodes. …
  4. sync will flush the file system buffer.

What are inactive pages in Linux?

The Inactive pages are the first candidate for eviction should the system come under memory pressure. High values are not harmful and it is a general behavior of Linux to keep as much cached as opposed to free as possible (it’s for better performance in the case of frequently-used items).

Which type of memory is called inactive memory?

Active memory is memory that is being used by a particular process. Inactive memory is memory that was allocated to a process that is no longer running. are pages which have not been accessed “recently” to see the memory use /proc/meminfo rather than vmstat -a cat /proc/meminfo.

Is Ram a active memory?

RAM is used as active memory that performs calculations on the data retrieved from storage. One significant difference between RAM and flash memory is that data must be erased from NAND flash memory in entire blocks. This makes it slower than RAM, where data can be erased in individual bits.

What is passive memory?

Active and Passive Memory:

When past experiences flash into our memory without an effort of the will, our memory is passive or spontaneous. The sight of a ripe mango reminds us of its sweet taste. The sight of a delicious dish reminds us of its flavour. These are instances of passive memory.

How do I check memory on Linux?


  1. Open the command line.
  2. Type the following command: grep MemTotal /proc/meminfo.
  3. You should see something similar to the following as output: MemTotal: 4194304 kB.
  4. This is your total available memory.

How do I clear space on Linux server?

Freeing disk space on your Linux server

  1. Get to the root of your machine by running cd /
  2. Run sudo du -h –max-depth=1.
  3. Note which directories are using a lot of disk space.
  4. cd into one of the big directories.
  5. Run ls -l to see which files are using a lot of space. Delete any you don’t need.
  6. Repeat steps 2 to 5.

What is Meminfo in Linux?

Understanding /proc/meminfo file (Analyzing Memory utilization in Linux) … – The ‘/proc/meminfo’ is used by to report the amount of free and used memory (both physical and swap) on the system as well as the shared memory and buffers used by the kernel.

What is Linux RAM?

The RAM, for Random Access Memory, is a critical component of a Linux system that needs to be monitored closely. In some cases, you might run out of memory, leaving your server with very slow response times or being completely unresponsive.

What is Proc partitions in Linux?

The /proc/partitions file contains a table with major and minor number of partitioned devices, their number of blocks and the device name in /dev. … The major number determines the device driver to be used with this device. The minor number is a unique identification of an instance of this device type.

What are the 4 types of memory?

Most scientists believe there are at least four general types of memory:

  • working memory.
  • sensory memory.
  • short-term memory.
  • long-term memory.

What is short term memory called?

Short-term memory, also known as primary or active memory, is the capacity to store a small amount of information in the mind and keep it readily available for a short period of time.

How many types of memory are there?

In the broadest sense, there are three types of memory: sensory memory, short-term memory, and long-term memory.

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