Update docs: network optimizations

docs/validator/compile-and-run-a-node.md

@@ -30,6 +30,18 @@ If you are looking to learn how to compile and run a NEAR validator node nativel
     $ apt update
     $ apt install -y git binutils-dev libcurl4-openssl-dev zlib1g-dev libdw-dev libiberty-dev cmake gcc g++ python docker.io protobuf-compiler libssl-dev pkg-config clang llvm cargo awscli
     ```
+### Network optimizations {#network-optimizations}
+To optimize the network settings for better performance, execute the following commands:
+```bash
+MaxExpectedPathBDP=8388608
+sudo sysctl -w net.core.rmem_max=$MaxExpectedPathBDP
+sudo sysctl -w net.core.wmem_max=$MaxExpectedPathBDP
+sudo sysctl -w net.ipv4.tcp_rmem="4096 87380 $MaxExpectedPathBDP"
+sudo sysctl -w net.ipv4.tcp_wmem="4096 16384 $MaxExpectedPathBDP"
+sudo sysctl -w net.ipv4.tcp_slow_start_after_idle=0
+```
+
+It is required to apply these changes for freshly started node and after each restart.
 
 ## How to use this document {#how-to-use-this-document}