Linux quick release port with free memory cache

In the Linux system to do system testing sometimes encountered too much time to release the port, resulting in the application of errors, the use of the following command to allow the port to be quickly recycled. However, it is important to note that opening the Tcp_tw_reccycle,kernel will check the timestamp of the packet on the end machine, so whether the tcp_tw_reccycle is open on the production or not depends on the application.

Sysctl-w net.ipv4.tcp_tw_recycle=1

When testing block device performance, some data will be cached in memory, resulting in a virtual large test result, using the following command to empty the memory cache

Sysctl-w vm.drop_caches=3-w vm.drop_caches=0

Linux quick release port with free memory cache