- Added configuration parameters for search coordinator thread pool sizes

- Added database connection pool size configuration parameter (spring.datasource.hikari.maximum-pool-size)
- Fixed a bug in parsing elastic rest_url for all FHIR versions except for R4, which was correct.

src/main/java/ca/uhn/fhir/jpa/starter/AppProperties.java

@@ -67,6 +67,10 @@ public class AppProperties {
   private Boolean lastn_enabled = false;
   private NormalizedQuantitySearchLevel normalized_quantity_search_level = NormalizedQuantitySearchLevel.NORMALIZED_QUANTITY_SEARCH_NOT_SUPPORTED;
 
+  private Integer search_coord_core_pool_size = 20;
+  private Integer search_coord_max_pool_size = 100;
+  private Integer search_coord_queue_capacity = 200;
+
   public Integer getDefer_indexing_for_codesystems_of_size() {
     return defer_indexing_for_codesystems_of_size;
   }
@@ -422,6 +426,23 @@ public class AppProperties {
 	this.normalized_quantity_search_level = normalized_quantity_search_level;
   }
 
+  public Integer getSearch_coord_core_pool_size() { return search_coord_core_pool_size; }
+
+  public void setSearch_coord_core_pool_size(Integer search_coord_core_pool_size) {
+    this.search_coord_core_pool_size = search_coord_core_pool_size;
+  }
+
+  public Integer getSearch_coord_max_pool_size() { return search_coord_max_pool_size; }
+
+  public void setSearch_coord_max_pool_size(Integer search_coord_max_pool_size) {
+    this.search_coord_max_pool_size = search_coord_max_pool_size;
+  }
+
+  public Integer getSearch_coord_queue_capacity() { return search_coord_queue_capacity; }
+
+  public void setSearch_coord_queue_capacity(Integer search_coord_queue_capacity) {
+  	 this.search_coord_queue_capacity = search_coord_queue_capacity;
+  }
 
 public static class Cors {
     private Boolean allow_Credentials = true;