diff --git a/src/main/java/org/codelibs/fess/app/service/ElevateWordService.java b/src/main/java/org/codelibs/fess/app/service/ElevateWordService.java
index 17c922354..e67d44e77 100644
--- a/src/main/java/org/codelibs/fess/app/service/ElevateWordService.java
+++ b/src/main/java/org/codelibs/fess/app/service/ElevateWordService.java
@@ -237,7 +237,7 @@ public class ElevateWordService {
                     logger.warn("Failed to read a sugget elevate word: " + list, e);
                 }
             }
-            fessEsClient.refresh("_all"); // TODO replace _all
+            elevateWordBhv.refresh();
         } catch (final IOException e) {
             logger.warn("Failed to read a sugget elevate word.", e);
         }
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java b/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java
index 4a3e6b622..1758d1d1f 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java
@@ -374,7 +374,7 @@ public class AdminUpgradeAction extends FessAdminAction {
 
             saveInfo(messages -> messages.addSuccessUpgradeFrom(GLOBAL));
 
-            fessEsClient.refresh("_all");
+            fessEsClient.refresh();
         } catch (final Exception e) {
             logger.warn("Failed to upgrade data.", e);
             saveError(messages -> messages.addErrorsFailedToUpgradeFrom(GLOBAL, "10.0", e.getLocalizedMessage()));
diff --git a/src/main/java/org/codelibs/fess/es/client/FessEsClient.java b/src/main/java/org/codelibs/fess/es/client/FessEsClient.java
index 347461940..5a374900b 100644
--- a/src/main/java/org/codelibs/fess/es/client/FessEsClient.java
+++ b/src/main/java/org/codelibs/fess/es/client/FessEsClient.java
@@ -722,36 +722,36 @@ public class FessEsClient implements Client {
         }
     }
 
-    public void refresh(final String index) {
-        client.admin().indices().prepareRefresh(index).execute(new ActionListener<RefreshResponse>() {
+    public void refresh(final String... indices) {
+        client.admin().indices().prepareRefresh(indices).execute(new ActionListener<RefreshResponse>() {
             @Override
             public void onResponse(final RefreshResponse response) {
                 if (logger.isDebugEnabled()) {
-                    logger.debug("Refreshed " + index + ".");
+                    logger.debug("Refreshed " + stream(indices).get(stream -> stream.collect(Collectors.joining(", "))) + ".");
                 }
             }
 
             @Override
             public void onFailure(final Throwable e) {
-                logger.error("Failed to refresh " + index + ".", e);
+                logger.error("Failed to refresh " + stream(indices).get(stream -> stream.collect(Collectors.joining(", "))) + ".", e);
             }
         });
 
     }
 
-    public void flush(final String index) {
-        client.admin().indices().prepareFlush(index).execute(new ActionListener<FlushResponse>() {
+    public void flush(final String... indices) {
+        client.admin().indices().prepareFlush(indices).execute(new ActionListener<FlushResponse>() {
 
             @Override
             public void onResponse(final FlushResponse response) {
                 if (logger.isDebugEnabled()) {
-                    logger.debug("Flushed " + index + ".");
+                    logger.debug("Flushed " + stream(indices).get(stream -> stream.collect(Collectors.joining(", "))) + ".");
                 }
             }
 
             @Override
             public void onFailure(final Throwable e) {
-                logger.error("Failed to flush " + index + ".", e);
+                logger.error("Failed to flush " + stream(indices).get(stream -> stream.collect(Collectors.joining(", "))) + ".", e);
             }
         });
 
diff --git a/src/main/java/org/codelibs/fess/es/config/allcommon/EsAbstractBehavior.java b/src/main/java/org/codelibs/fess/es/config/allcommon/EsAbstractBehavior.java
index 893e7173e..e7bed9ebc 100644
--- a/src/main/java/org/codelibs/fess/es/config/allcommon/EsAbstractBehavior.java
+++ b/src/main/java/org/codelibs/fess/es/config/allcommon/EsAbstractBehavior.java
@@ -39,6 +39,7 @@ import org.dbflute.cbean.result.ListResultBean;
 import org.dbflute.exception.FetchingOverSafetySizeException;
 import org.dbflute.exception.IllegalBehaviorStateException;
 import org.dbflute.util.DfTypeUtil;
+import org.elasticsearch.action.admin.indices.refresh.RefreshResponse;
 import org.elasticsearch.action.bulk.BulkItemResponse;
 import org.elasticsearch.action.bulk.BulkRequestBuilder;
 import org.elasticsearch.action.bulk.BulkResponse;
@@ -72,6 +73,7 @@ public abstract class EsAbstractBehavior<ENTITY extends Entity, CB extends Condi
     protected String scrollSearchTimeout = "3m";
     protected String bulkTimeout = "3m";
     protected String deleteTimeout = "3m";
+    protected String refreshTimeout = "1m";
 
     protected abstract String asEsIndex();
 
@@ -81,6 +83,13 @@ public abstract class EsAbstractBehavior<ENTITY extends Entity, CB extends Condi
 
     protected abstract <RESULT extends ENTITY> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType);
 
+    // ===================================================================================
+    //                                                                       Elasticsearch
+    //                                                                              ======
+    public RefreshResponse refresh() {
+        return client.admin().indices().prepareRefresh(asEsIndex()).execute().actionGet(refreshTimeout);
+    }
+
     // ===================================================================================
     //                                                                              Select
     //                                                                              ======
@@ -474,6 +483,10 @@ public abstract class EsAbstractBehavior<ENTITY extends Entity, CB extends Condi
         this.deleteTimeout = deleteTimeout;
     }
 
+    public void setRefreshTimeout(String refreshTimeout) {
+        this.refreshTimeout = refreshTimeout;
+    }
+
     // ===================================================================================
     //                                                                        Assist Logic
     //                                                                        ============
diff --git a/src/main/java/org/codelibs/fess/es/log/allcommon/EsAbstractBehavior.java b/src/main/java/org/codelibs/fess/es/log/allcommon/EsAbstractBehavior.java
index dacf756cb..caf3453cb 100644
--- a/src/main/java/org/codelibs/fess/es/log/allcommon/EsAbstractBehavior.java
+++ b/src/main/java/org/codelibs/fess/es/log/allcommon/EsAbstractBehavior.java
@@ -39,6 +39,7 @@ import org.dbflute.cbean.result.ListResultBean;
 import org.dbflute.exception.FetchingOverSafetySizeException;
 import org.dbflute.exception.IllegalBehaviorStateException;
 import org.dbflute.util.DfTypeUtil;
+import org.elasticsearch.action.admin.indices.refresh.RefreshResponse;
 import org.elasticsearch.action.bulk.BulkItemResponse;
 import org.elasticsearch.action.bulk.BulkRequestBuilder;
 import org.elasticsearch.action.bulk.BulkResponse;
@@ -72,6 +73,7 @@ public abstract class EsAbstractBehavior<ENTITY extends Entity, CB extends Condi
     protected String scrollSearchTimeout = "3m";
     protected String bulkTimeout = "3m";
     protected String deleteTimeout = "3m";
+    protected String refreshTimeout = "1m";
 
     protected abstract String asEsIndex();
 
@@ -81,6 +83,13 @@ public abstract class EsAbstractBehavior<ENTITY extends Entity, CB extends Condi
 
     protected abstract <RESULT extends ENTITY> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType);
 
+    // ===================================================================================
+    //                                                                       Elasticsearch
+    //                                                                              ======
+    public RefreshResponse refresh() {
+        return client.admin().indices().prepareRefresh(asEsIndex()).execute().actionGet(refreshTimeout);
+    }
+
     // ===================================================================================
     //                                                                              Select
     //                                                                              ======
@@ -474,6 +483,10 @@ public abstract class EsAbstractBehavior<ENTITY extends Entity, CB extends Condi
         this.deleteTimeout = deleteTimeout;
     }
 
+    public void setRefreshTimeout(String refreshTimeout) {
+        this.refreshTimeout = refreshTimeout;
+    }
+
     // ===================================================================================
     //                                                                        Assist Logic
     //                                                                        ============
diff --git a/src/main/java/org/codelibs/fess/es/user/allcommon/EsAbstractBehavior.java b/src/main/java/org/codelibs/fess/es/user/allcommon/EsAbstractBehavior.java
index 57ed92503..3c0277eb9 100644
--- a/src/main/java/org/codelibs/fess/es/user/allcommon/EsAbstractBehavior.java
+++ b/src/main/java/org/codelibs/fess/es/user/allcommon/EsAbstractBehavior.java
@@ -39,6 +39,7 @@ import org.dbflute.cbean.result.ListResultBean;
 import org.dbflute.exception.FetchingOverSafetySizeException;
 import org.dbflute.exception.IllegalBehaviorStateException;
 import org.dbflute.util.DfTypeUtil;
+import org.elasticsearch.action.admin.indices.refresh.RefreshResponse;
 import org.elasticsearch.action.bulk.BulkItemResponse;
 import org.elasticsearch.action.bulk.BulkRequestBuilder;
 import org.elasticsearch.action.bulk.BulkResponse;
@@ -72,6 +73,7 @@ public abstract class EsAbstractBehavior<ENTITY extends Entity, CB extends Condi
     protected String scrollSearchTimeout = "3m";
     protected String bulkTimeout = "3m";
     protected String deleteTimeout = "3m";
+    protected String refreshTimeout = "1m";
 
     protected abstract String asEsIndex();
 
@@ -81,6 +83,13 @@ public abstract class EsAbstractBehavior<ENTITY extends Entity, CB extends Condi
 
     protected abstract <RESULT extends ENTITY> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType);
 
+    // ===================================================================================
+    //                                                                       Elasticsearch
+    //                                                                              ======
+    public RefreshResponse refresh() {
+        return client.admin().indices().prepareRefresh(asEsIndex()).execute().actionGet(refreshTimeout);
+    }
+
     // ===================================================================================
     //                                                                              Select
     //                                                                              ======
@@ -474,6 +483,10 @@ public abstract class EsAbstractBehavior<ENTITY extends Entity, CB extends Condi
         this.deleteTimeout = deleteTimeout;
     }
 
+    public void setRefreshTimeout(String refreshTimeout) {
+        this.refreshTimeout = refreshTimeout;
+    }
+
     // ===================================================================================
     //                                                                        Assist Logic
     //                                                                        ============