Add note on memory limit

README.md

@@ -81,3 +81,14 @@ Various LDAP plugins were tested when this app was made.
 * [LDAP Login For Intranet sites](https://wordpress.org/plugins/ldap-login-for-intranet-sites/)
     - makes you register with miniorange
 
+## Memory
+
+The default PHP `memory_limit` is used - 128MB.
+
+`WP_MEMORY_LIMIT` is the default (40MB). `WP_MAX_MEMORY_LIMIT` (admin pages) is also
+default (50MB).
+
+Apache configuration
+    MaxConnectionsPerChild is 0 by default - When to recycle
+    MaxRequestWorkers     150 - Concurrent workers after which requests are queued
+