diff --git a/server-spi/src/main/java/org/keycloak/models/Constants.java b/server-spi/src/main/java/org/keycloak/models/Constants.java
index edc9567e37..68c83b2a5a 100755
--- a/server-spi/src/main/java/org/keycloak/models/Constants.java
+++ b/server-spi/src/main/java/org/keycloak/models/Constants.java
@@ -54,4 +54,6 @@ public interface Constants {
 
     // Indication to admin-rest-endpoint that realm keys should be re-generated
     String GENERATE = "GENERATE";
+
+    int DEFAULT_MAX_RESULTS = 100;
 }
diff --git a/services/src/main/java/org/keycloak/authorization/admin/PolicyService.java b/services/src/main/java/org/keycloak/authorization/admin/PolicyService.java
index ffc61e5536..e274bea07f 100644
--- a/services/src/main/java/org/keycloak/authorization/admin/PolicyService.java
+++ b/services/src/main/java/org/keycloak/authorization/admin/PolicyService.java
@@ -26,6 +26,7 @@ import org.keycloak.authorization.policy.provider.PolicyProviderAdminService;
 import org.keycloak.authorization.policy.provider.PolicyProviderFactory;
 import org.keycloak.authorization.store.PolicyStore;
 import org.keycloak.authorization.store.StoreFactory;
+import org.keycloak.models.Constants;
 import org.keycloak.models.utils.ModelToRepresentation;
 import org.keycloak.representations.idm.authorization.PolicyProviderRepresentation;
 import org.keycloak.representations.idm.authorization.PolicyRepresentation;
@@ -242,7 +243,7 @@ public class PolicyService {
         }
 
         return Response.ok(
-                storeFactory.getPolicyStore().findByResourceServer(search, resourceServer.getId(), firstResult != null ? firstResult : -1, maxResult != null ? maxResult : -1).stream()
+                storeFactory.getPolicyStore().findByResourceServer(search, resourceServer.getId(), firstResult != null ? firstResult : -1, maxResult != null ? maxResult : Constants.DEFAULT_MAX_RESULTS).stream()
                         .map(policy -> toRepresentation(policy, authorization))
                         .collect(Collectors.toList()))
                 .build();
diff --git a/services/src/main/java/org/keycloak/authorization/admin/ResourceSetService.java b/services/src/main/java/org/keycloak/authorization/admin/ResourceSetService.java
index 64ef0619c1..9389992316 100644
--- a/services/src/main/java/org/keycloak/authorization/admin/ResourceSetService.java
+++ b/services/src/main/java/org/keycloak/authorization/admin/ResourceSetService.java
@@ -27,6 +27,7 @@ import org.keycloak.authorization.store.PolicyStore;
 import org.keycloak.authorization.store.ResourceStore;
 import org.keycloak.authorization.store.StoreFactory;
 import org.keycloak.models.ClientModel;
+import org.keycloak.models.Constants;
 import org.keycloak.models.RealmModel;
 import org.keycloak.models.UserModel;
 import org.keycloak.representations.idm.authorization.ResourceRepresentation;
@@ -233,7 +234,7 @@ public class ResourceSetService {
         }
 
         return Response.ok(
-                storeFactory.getResourceStore().findByResourceServer(search, this.resourceServer.getId(), firstResult != null ? firstResult : -1, maxResult != null ? maxResult : -1).stream()
+                storeFactory.getResourceStore().findByResourceServer(search, this.resourceServer.getId(), firstResult != null ? firstResult : -1, maxResult != null ? maxResult : Constants.DEFAULT_MAX_RESULTS).stream()
                         .map(resource -> toRepresentation(resource, this.resourceServer, authorization))
                         .collect(Collectors.toList()))
                 .build();
diff --git a/services/src/main/java/org/keycloak/authorization/admin/ScopeService.java b/services/src/main/java/org/keycloak/authorization/admin/ScopeService.java
index f050f324f1..83cffebdc5 100644
--- a/services/src/main/java/org/keycloak/authorization/admin/ScopeService.java
+++ b/services/src/main/java/org/keycloak/authorization/admin/ScopeService.java
@@ -25,6 +25,7 @@ import org.keycloak.authorization.model.ResourceServer;
 import org.keycloak.authorization.model.Scope;
 import org.keycloak.authorization.store.PolicyStore;
 import org.keycloak.authorization.store.StoreFactory;
+import org.keycloak.models.Constants;
 import org.keycloak.representations.idm.authorization.ScopeRepresentation;
 import org.keycloak.services.ErrorResponse;
 import org.keycloak.services.resources.admin.RealmAuth;
@@ -177,7 +178,7 @@ public class ScopeService {
         }
 
         return Response.ok(
-                this.authorization.getStoreFactory().getScopeStore().findByResourceServer(search, this.resourceServer.getId(), firstResult != null ? firstResult : -1, maxResult != null ? maxResult : -1).stream()
+                this.authorization.getStoreFactory().getScopeStore().findByResourceServer(search, this.resourceServer.getId(), firstResult != null ? firstResult : -1, maxResult != null ? maxResult : Constants.DEFAULT_MAX_RESULTS).stream()
                         .map(scope -> toRepresentation(scope, this.authorization))
                         .collect(Collectors.toList()))
                 .build();
diff --git a/services/src/main/java/org/keycloak/services/resources/admin/ClientResource.java b/services/src/main/java/org/keycloak/services/resources/admin/ClientResource.java
index a363e3906d..8928568ac6 100755
--- a/services/src/main/java/org/keycloak/services/resources/admin/ClientResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/ClientResource.java
@@ -27,6 +27,7 @@ import org.keycloak.events.admin.OperationType;
 import org.keycloak.events.admin.ResourceType;
 import org.keycloak.models.ClientModel;
 import org.keycloak.models.ClientSessionModel;
+import org.keycloak.models.Constants;
 import org.keycloak.models.KeycloakSession;
 import org.keycloak.models.ModelDuplicateException;
 import org.keycloak.models.RealmModel;
@@ -403,7 +404,7 @@ public class ClientResource {
      * Returns a list of user sessions associated with this client
      *
      * @param firstResult Paging offset
-     * @param maxResults Paging size
+     * @param maxResults Maximum results size (defaults to 100)
      * @return
      */
     @Path("user-sessions")
@@ -418,7 +419,7 @@ public class ClientResource {
         }
 
         firstResult = firstResult != null ? firstResult : -1;
-        maxResults = maxResults != null ? maxResults : -1;
+        maxResults = maxResults != null ? maxResults : Constants.DEFAULT_MAX_RESULTS;
         List<UserSessionRepresentation> sessions = new ArrayList<UserSessionRepresentation>();
         for (UserSessionModel userSession : session.sessions().getUserSessions(client.getRealm(), client, firstResult, maxResults)) {
             UserSessionRepresentation rep = ModelToRepresentation.toRepresentation(userSession);
@@ -460,7 +461,7 @@ public class ClientResource {
      * Returns a list of offline user sessions associated with this client
      *
      * @param firstResult Paging offset
-     * @param maxResults Paging size
+     * @param maxResults Maximum results size (defaults to 100)
      * @return
      */
     @Path("offline-sessions")
@@ -475,7 +476,7 @@ public class ClientResource {
         }
 
         firstResult = firstResult != null ? firstResult : -1;
-        maxResults = maxResults != null ? maxResults : -1;
+        maxResults = maxResults != null ? maxResults : Constants.DEFAULT_MAX_RESULTS;
         List<UserSessionRepresentation> sessions = new ArrayList<UserSessionRepresentation>();
         List<UserSessionModel> userSessions = session.sessions().getOfflineUserSessions(client.getRealm(), client, firstResult, maxResults);
         for (UserSessionModel userSession : userSessions) {
diff --git a/services/src/main/java/org/keycloak/services/resources/admin/GroupResource.java b/services/src/main/java/org/keycloak/services/resources/admin/GroupResource.java
index 11cb56760e..2d5476b613 100755
--- a/services/src/main/java/org/keycloak/services/resources/admin/GroupResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/GroupResource.java
@@ -21,6 +21,7 @@ import org.jboss.resteasy.spi.NotFoundException;
 import org.jboss.resteasy.spi.ResteasyProviderFactory;
 import org.keycloak.events.admin.OperationType;
 import org.keycloak.events.admin.ResourceType;
+import org.keycloak.models.Constants;
 import org.keycloak.models.GroupModel;
 import org.keycloak.models.KeycloakSession;
 import org.keycloak.models.RealmModel;
@@ -196,7 +197,7 @@ public class GroupResource {
      * Returns a list of users, filtered according to query parameters
      *
      * @param firstResult Pagination offset
-     * @param maxResults Pagination size
+     * @param maxResults Maximum results size (defaults to 100)
      * @return
      */
     @GET
@@ -212,7 +213,7 @@ public class GroupResource {
         }
 
         firstResult = firstResult != null ? firstResult : -1;
-        maxResults = maxResults != null ? maxResults : -1;
+        maxResults = maxResults != null ? maxResults : Constants.DEFAULT_MAX_RESULTS;
 
         List<UserRepresentation> results = new ArrayList<UserRepresentation>();
         List<UserModel> userModels = session.users().getGroupMembers(realm, group, firstResult, maxResults);
diff --git a/services/src/main/java/org/keycloak/services/resources/admin/RealmAdminResource.java b/services/src/main/java/org/keycloak/services/resources/admin/RealmAdminResource.java
index 05b4b9b2f5..fb5241ce59 100644
--- a/services/src/main/java/org/keycloak/services/resources/admin/RealmAdminResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/RealmAdminResource.java
@@ -517,7 +517,7 @@ public class RealmAdminResource {
      * @param dateTo To date
      * @param dateFrom From date
      * @param firstResult Paging offset
-     * @param maxResults Paging size
+     * @param maxResults Maximum results size (defaults to 100)
      * @return
      */
     @Path("events")
@@ -579,6 +579,8 @@ public class RealmAdminResource {
         }
         if (maxResults != null) {
             query.maxResults(maxResults);
+        } else {
+            query.maxResults(Constants.DEFAULT_MAX_RESULTS);
         }
 
         return toEventListRep(query.getResultList());
@@ -606,7 +608,7 @@ public class RealmAdminResource {
      * @param dateTo
      * @param dateFrom
      * @param firstResult
-     * @param maxResults
+     * @param maxResults Maximum results size (defaults to 100)
      * @return
      */
     @Path("admin-events")
@@ -689,6 +691,8 @@ public class RealmAdminResource {
         }
         if (maxResults != null) {
             query.maxResults(maxResults);
+        } else {
+            query.maxResults(Constants.DEFAULT_MAX_RESULTS);
         }
 
         return toAdminEventRep(query.getResultList());
diff --git a/services/src/main/java/org/keycloak/services/resources/admin/UsersResource.java b/services/src/main/java/org/keycloak/services/resources/admin/UsersResource.java
index 8ab450e5d3..fdd3faa83d 100755
--- a/services/src/main/java/org/keycloak/services/resources/admin/UsersResource.java
+++ b/services/src/main/java/org/keycloak/services/resources/admin/UsersResource.java
@@ -650,7 +650,7 @@ public class UsersResource {
      * @param email
      * @param username
      * @param first Pagination offset
-     * @param maxResults Pagination size
+     * @param maxResults Maximum results size (defaults to 100)
      * @return
      */
     @GET
@@ -666,7 +666,7 @@ public class UsersResource {
         auth.requireView();
 
         firstResult = firstResult != null ? firstResult : -1;
-        maxResults = maxResults != null ? maxResults : -1;
+        maxResults = maxResults != null ? maxResults : Constants.DEFAULT_MAX_RESULTS;
 
         List<UserRepresentation> results = new ArrayList<UserRepresentation>();
         List<UserModel> userModels;