Swap is used for cases, when system run out of available RAM. If server have no available RAM for process, it will crush/hung. Swap way extremely low, comparable to RAM and add extra load to disks. When you run a lot of Linux servers it is a great idea to have “swap cleaner” clear up […]
MTU in networks is Maximum Transmission Unit. And basically, it indicates the maximum size of packet what could be processed by network device without fragmentation. The default MTU is 1500, therefore, all packets what is bigger than 1500 bytes, should be fragmented to successfully transferred by network devices. Misconfiguration of MTU on different sides of […]
First i should mention: Playing mindlessly with this could lead to server instability. In some cases, some applications “eats” unbelievable amount of memory for buffers/cache, what could lead to different negative outcomes.For example, if server has 48Gb of RAM and some application uses 40Gb of this RAM for buffer/cache, it might be a good idea […]
Let’s say, you decided to NOT use a great complex solution from SolarWinds, but still look for a great monitoring solution. In this case, Zabbix is your best friend. Its flexibility could be a great asset for the company, but it is still not the ideal solution. Here is a simple solution to how to […]
Yep. For small companies, it might be not important, how you build/configure your DNS servers, as you might need to serve just a few queries per second or a few queries per minute. But good design is key to success if your goal is to serve thousands and thousands of queries per minute or second.Here […]