diff --git a/hapi-fhir-jpaserver-api/src/main/java/ca/uhn/fhir/jpa/api/config/DaoConfig.java b/hapi-fhir-jpaserver-api/src/main/java/ca/uhn/fhir/jpa/api/config/DaoConfig.java
index d45156245b0..6b494fa7ed2 100644
--- a/hapi-fhir-jpaserver-api/src/main/java/ca/uhn/fhir/jpa/api/config/DaoConfig.java
+++ b/hapi-fhir-jpaserver-api/src/main/java/ca/uhn/fhir/jpa/api/config/DaoConfig.java
@@ -608,6 +608,11 @@ public class DaoConfig {
 	 * <code>_sort</code> parameter on searches): If the server is configured
 	 * to not index missing field.
 	 * </p>
+	 * <p>
+	 * The following index may need to be added into the indexed tables such as <code>HFJ_SPIDX_TOKEN</code> 
+	 * to improve the search performance while <code>:missing</code> is enabled.
+	 * <code>RES_TYPE, SP_NAME, SP_MISSING</code>
+	 * </p>
 	 */
 	public void setIndexMissingFields(IndexEnabledEnum theIndexMissingFields) {
 		Validate.notNull(theIndexMissingFields, "theIndexMissingFields must not be null");
diff --git a/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/config/BaseConfig.java b/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/config/BaseConfig.java
index 0c24c591ac7..579ef42ee11 100644
--- a/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/config/BaseConfig.java
+++ b/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/config/BaseConfig.java
@@ -151,6 +151,7 @@ import org.springframework.scheduling.concurrent.ScheduledExecutorFactoryBean;
 import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
 
 import javax.annotation.Nullable;
+import javax.annotation.PostConstruct;
 import java.util.Date;
 
 /*
@@ -200,6 +201,29 @@ public abstract class BaseConfig {
 	@Autowired
 	private DaoRegistry myDaoRegistry;
 
+	/**
+	 * Subclasses may override this method to provide settings such as search coordinator pool sizes.
+	 */
+	@PostConstruct
+	public void initSettings() {}
+
+	private Integer searchCoordCorePoolSize = 20;
+	private Integer searchCoordMaxPoolSize = 100;
+	private Integer searchCoordQueueCapacity = 200;
+
+	public void setSearchCoordCorePoolSize(Integer searchCoordCorePoolSize) {
+		this.searchCoordCorePoolSize = searchCoordCorePoolSize;
+	}
+
+	public void setSearchCoordMaxPoolSize(Integer searchCoordMaxPoolSize) {
+		this.searchCoordMaxPoolSize = searchCoordMaxPoolSize;
+	}
+
+	public void setSearchCoordQueueCapacity(Integer searchCoordQueueCapacity) {
+		this.searchCoordQueueCapacity = searchCoordQueueCapacity;
+	}
+
+
 	@Bean
 	public BatchConfigurer batchConfigurer() {
 		return new NonPersistedBatchConfigurer();
@@ -316,6 +340,9 @@ public abstract class BaseConfig {
 	public ThreadPoolTaskExecutor searchCoordinatorThreadFactory() {
 		final ThreadPoolTaskExecutor threadPoolTaskExecutor = new ThreadPoolTaskExecutor();
 		threadPoolTaskExecutor.setThreadNamePrefix("search_coord_");
+		threadPoolTaskExecutor.setCorePoolSize(searchCoordCorePoolSize);
+		threadPoolTaskExecutor.setMaxPoolSize(searchCoordMaxPoolSize);
+		threadPoolTaskExecutor.setQueueCapacity(searchCoordQueueCapacity);
 		threadPoolTaskExecutor.initialize();
 		return threadPoolTaskExecutor;
 	}
diff --git a/hapi-fhir-jpaserver-migrate/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java b/hapi-fhir-jpaserver-migrate/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java
index ec2e34b732c..a53a5a1f6da 100644
--- a/hapi-fhir-jpaserver-migrate/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java
+++ b/hapi-fhir-jpaserver-migrate/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java
@@ -71,9 +71,23 @@ public class HapiFhirJpaMigrationTasks extends BaseMigrationTasks<VersionEnum> {
 		init501(); // 20200514 - 20200515
 		init510(); // 20200516 - 20201028
 		init520(); // 20201029 -
-		init530();
+		init530(); 
+		init540(); // 20210218 - 
 	}
 
+	private void init540() {
+		
+		Builder version = forVersion(VersionEnum.V5_4_0);
+		
+		//-- add index on HFJ_SPIDX_DATE
+	    version.onTable("HFJ_SPIDX_DATE").addIndex("20210309.1", "IDX_SP_DATE_HASH_HIGH")
+	        .unique(false).withColumns("HASH_IDENTITY", "SP_VALUE_HIGH");
+	    
+		//-- add index on HFJ_FORCED_ID
+	    version.onTable("HFJ_FORCED_ID").addIndex("20210309.2", "IDX_FORCEID_FID")
+	        .unique(false).withColumns("FORCED_ID");   
+	}
+	
 	private void init530() {
 		Builder version = forVersion(VersionEnum.V5_3_0);
 	
@@ -126,6 +140,7 @@ public class HapiFhirJpaMigrationTasks extends BaseMigrationTasks<VersionEnum> {
 		// HFJ_RES_LINK
 		version.onTable("HFJ_RES_LINK")
 			.addColumn("20210126.1", "TARGET_RESOURCE_VERSION").nullable().type(ColumnTypeEnum.LONG);
+
 	}
 
 	protected void init520() {
diff --git a/hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ForcedId.java b/hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ForcedId.java
index 638b070b1ae..64d6d4d4566 100644
--- a/hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ForcedId.java
+++ b/hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ForcedId.java
@@ -31,6 +31,7 @@ import javax.persistence.ForeignKey;
 import javax.persistence.GeneratedValue;
 import javax.persistence.GenerationType;
 import javax.persistence.Id;
+import javax.persistence.Index;
 import javax.persistence.JoinColumn;
 import javax.persistence.OneToOne;
 import javax.persistence.SequenceGenerator;
@@ -48,6 +49,7 @@ import javax.persistence.UniqueConstraint;
 	 * - IDX_FORCEDID_TYPE_RESID
 	 * so don't reuse these names
 	 */
+	@Index(name = "IDX_FORCEID_FID", columnList = "FORCED_ID")
 })
 public class ForcedId extends BasePartitionable {
 
diff --git a/hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ResourceIndexedSearchParamDate.java b/hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ResourceIndexedSearchParamDate.java
index 17adca2a4d9..868f759870d 100644
--- a/hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ResourceIndexedSearchParamDate.java
+++ b/hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ResourceIndexedSearchParamDate.java
@@ -55,6 +55,7 @@ import java.util.Date;
 	// We previously had an index called IDX_SP_DATE - Dont reuse
 	@Index(name = "IDX_SP_DATE_HASH", columnList = "HASH_IDENTITY,SP_VALUE_LOW,SP_VALUE_HIGH"),
 	@Index(name = "IDX_SP_DATE_HASH_LOW", columnList = "HASH_IDENTITY,SP_VALUE_LOW"),
+	@Index(name = "IDX_SP_DATE_HASH_HIGH", columnList = "HASH_IDENTITY,SP_VALUE_HIGH"),
 	@Index(name = "IDX_SP_DATE_ORD_HASH", columnList = "HASH_IDENTITY,SP_VALUE_LOW_DATE_ORDINAL,SP_VALUE_HIGH_DATE_ORDINAL"),
 	@Index(name = "IDX_SP_DATE_ORD_HASH_LOW", columnList = "HASH_IDENTITY,SP_VALUE_LOW_DATE_ORDINAL"),
 	@Index(name = "IDX_SP_DATE_RESID", columnList = "RES_ID"),