diff --git a/wdl/tasks/VariantCalling/PBSV.wdl b/wdl/tasks/VariantCalling/PBSV.wdl
index 3ea260456..1815665c8 100644
--- a/wdl/tasks/VariantCalling/PBSV.wdl
+++ b/wdl/tasks/VariantCalling/PBSV.wdl
@@ -154,7 +154,7 @@ task Discover {
     String disk_type = if is_ont then "SSD" else "HDD"
 
     Int num_cores = if(defined(chr)) then 4 else 32
-    Int memory = 2 * num_cores
+    Int memory = if ("chr3"==chr || "chr22"==chr)  then 6 * num_cores else 2 * num_cores
 
     RuntimeAttr default_attr = object {
         cpu_cores:          num_cores,