What is zram

So a kind of swap in memory. However, the CPU has to work in more because they compress the data has or unpack again when they are needed. The advantage clearly lies in the speed. Since the swap partition in RAM is much faster than this is a swap partition on a hard drive. In itself a great thing. Compressed by the "enlarged" so to speak of the available memory. The S2 has 1GB but the rich, and more than. There must not be artificially pushed up to 1.

After you activate the ZRAM also has 2 disadvantages. The encoding and decoding using CPU time, which in turn has higher power consumption. For devices with too little RAM so it makes perfect sense. Restarting apps frequently will increase load in CPU which in turn increases battery consumption.

In Android smartphones RAM modules are fitted into the system while manufacturing. This can be done by the electric engineers. It is not possible increase RAM by using any software. Increasing RAM is not possible. These are the apps which might contain virus. But isn't the purpose of swap for when there's insufficient RAM? And although a small percentage of CPU time is used for this compression, the performance trade off is often worth it.

With those bits in hand, let's make this happen. I'm going to demonstrate on Ubuntu Server If you're using a different distribution, you'll only need to modify the systemd unit file to fit your distro of choice. The zRAM module is controlled by systemd, so there's no need for an fstab entry. And since everything is already installed out of the box, we only need to create a few files and modify one.

In order for zRAM to function, you're going to need to disable the traditional swap. This is handled within the fstab file. The compression ratio including memory used for disk overhead varies depending on the percent of maximum space utilized. This may typically vary from 1. It also is much faster at swapping pages than typical speeds for hard disk swap. Combining zram with a correctly tuned Portage configuration will should a desktop system running in a responsive manner even during intensive software compilation.

Prior to kernel 3. This can become a serious bottleneck for multi-core machines. To work around this problem, zram is capable of initializing multiple devices. For this reason, the recommended amount of devices for swap is 1 per CPU core for kernels prior to 3. Another caveat for systems with limited memory, non swap use can reduce the amount of available memory to run applications.