set nofile limit for Docker containers

trikko · Apr 26, 2024 · 42d539b · 42d539b
1 parent 73b0648
commit 42d539b
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/source/serverino/main.d b/source/serverino/main.d
@@ -123,6 +123,20 @@ template ServerinoLoop(Modules...)
 
    int mainServerinoLoop(string[] args)
    {
+
+      // Docker container has a too generous limit of open files, it slows down the server
+      version(Posix)
+      {
+         import core.sys.posix.sys.resource : rlimit, setrlimit, getrlimit, RLIMIT_NOFILE;
+         rlimit rlim;
+         getrlimit(RLIMIT_NOFILE, &rlim);
+
+         if (rlim.rlim_cur > 65536)
+            rlim.rlim_cur = 4096;
+
+         setrlimit(RLIMIT_NOFILE, &rlim);
+      }
+
       // Enable terminal colors on older windows
       version(Windows)
       {