diff --git a/conf/sbc_sharc.config b/conf/sbc_sharc.config
index de1ab0c..bf00d33 100644
--- a/conf/sbc_sharc.config
+++ b/conf/sbc_sharc.config
@@ -11,16 +11,21 @@
 */
 
 
+// nf-core specific parameters displayed in header summary of each run
+
 params {
-  
-  // nf-core specific parameters displayed in header summary of each run
 
   config_profile_description = 'Sheffield Bioinformatics Core - ShARC'
   config_profile_contact = 'Lewis Quayle (l.quayle@sheffield.ac.uk)'
   config_profile_url = 'https://docs.hpc.shef.ac.uk/en/latest/sharc/index.html'
-  
-  // hpc resource limits
 
+}
+
+
+// hpc resource limits
+
+params {
+  
   max_cpus = 16
   max_memory = 64.GB
   max_time = 96.h
@@ -42,6 +47,16 @@ process {
 }
 
 
+// optional executor settings
+
+executor {
+
+  queueSize = 10
+  submitRateLimit = '1 sec'
+
+}
+
+
 // container engine
 
 singularity {
@@ -50,4 +65,3 @@ singularity {
   autoMounts = true
 
 }
-