Scheduleng the Clear Memory Cache with Crontab Once the first command is completed, the next command will be triggered to clear cache memory. The next command is separated with a “ ”. Here the first command sync is used to synchronize all the in-memory cache files to the persistent storage. Clear page cache only in cache memory sync echo 1 | sudo tee /proc/sys/vm/drop_caches.Clear dentries and inodes only in cache memory sync echo 2 | sudo tee /proc/sys/vm/drop_caches.In short it will clear all the memory cache: sync echo 3 | sudo tee /proc/sys/vm/drop_caches Clear PageCache, dentries and inodes in cache memory.Choose one of the below options to flush the Linux system cache memory as per your requirements. There are three options available to clear the memory cache in Linux. This tutorial will help you to clear the memory cache on Linux/Unix system via the command line. Since it discards cached objects from memory, it may cost a significant amount of I/O and CPU to recreate the dropped objects. Clearing the Memory cache in Linux systems slows down the system performance as reading files from memory is much faster than persistent disk. It is safe but not recommended to clear the memory cache on a Linux system. You can also instruct kernel to clear RAM memory cache on system by adding a number in /proc/sys/vm/drop_caches file. In that cases, either you need to increase physical memory in the system or add more swap space. Sometimes the system goes out of memory due to huge RAM is used by cached objects.
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