diff --git a/operator/src/main/kotlin/eu/glasskube/operator/apps/gitea/GiteaSpec.kt b/operator/src/main/kotlin/eu/glasskube/operator/apps/gitea/GiteaSpec.kt
index 99514172..5586d4ea 100644
--- a/operator/src/main/kotlin/eu/glasskube/operator/apps/gitea/GiteaSpec.kt
+++ b/operator/src/main/kotlin/eu/glasskube/operator/apps/gitea/GiteaSpec.kt
@@ -20,7 +20,7 @@ data class GiteaSpec(
     val smtp: GiteaSmtp? = null,
     val resources: ResourceRequirements = ResourceRequirements(
         null,
-        mapOf("memory" to Quantity("300", "Mi")),
+        mapOf("memory" to Quantity("400", "Mi")),
         mapOf("memory" to Quantity("200", "Mi"))
     )
 )
diff --git a/operator/src/main/kotlin/eu/glasskube/operator/apps/gitea/dependent/GiteaPostgresCluster.kt b/operator/src/main/kotlin/eu/glasskube/operator/apps/gitea/dependent/GiteaPostgresCluster.kt
index e1ad0a04..e039af4c 100644
--- a/operator/src/main/kotlin/eu/glasskube/operator/apps/gitea/dependent/GiteaPostgresCluster.kt
+++ b/operator/src/main/kotlin/eu/glasskube/operator/apps/gitea/dependent/GiteaPostgresCluster.kt
@@ -23,6 +23,8 @@ import eu.glasskube.operator.infra.postgres.S3Credentials
 import eu.glasskube.operator.infra.postgres.StorageConfiguration
 import eu.glasskube.operator.infra.postgres.WalBackupConfiguration
 import eu.glasskube.operator.infra.postgres.postgresCluster
+import io.fabric8.kubernetes.api.model.Quantity
+import io.fabric8.kubernetes.api.model.ResourceRequirements
 import io.javaoperatorsdk.operator.api.reconciler.Context
 import io.javaoperatorsdk.operator.processing.dependent.kubernetes.CRUDKubernetesDependentResource
 import io.javaoperatorsdk.operator.processing.dependent.kubernetes.KubernetesDependent
@@ -58,6 +60,11 @@ class GiteaPostgresCluster : CRUDKubernetesDependentResource<PostgresCluster, Gi
                     wal = WalBackupConfiguration(compression = CompressionType.GZIP),
                     data = DataBackupConfiguration(compression = CompressionType.GZIP)
                 )
+            ),
+            resources = ResourceRequirements(
+                null,
+                mapOf("memory" to Quantity("512", "Mi")),
+                mapOf("memory" to Quantity("256", "Mi"))
             )
         )
     }
diff --git a/operator/src/main/kotlin/eu/glasskube/operator/apps/gitlab/GitlabSpec.kt b/operator/src/main/kotlin/eu/glasskube/operator/apps/gitlab/GitlabSpec.kt
index 5887d0c7..7f30c74e 100644
--- a/operator/src/main/kotlin/eu/glasskube/operator/apps/gitlab/GitlabSpec.kt
+++ b/operator/src/main/kotlin/eu/glasskube/operator/apps/gitlab/GitlabSpec.kt
@@ -17,7 +17,7 @@ data class GitlabSpec(
     val runners: List<GitlabRunnerSpecTemplate> = emptyList(),
     val resources: ResourceRequirements = ResourceRequirements(
         null,
-        emptyMap(),
+        mapOf("memory" to Quantity("3", "Gi")),
         mapOf("cpu" to Quantity("200", "m"), "memory" to Quantity("2", "Gi"))
     )
 )
diff --git a/operator/src/main/kotlin/eu/glasskube/operator/apps/gitlab/dependent/GitlabPostgresCluster.kt b/operator/src/main/kotlin/eu/glasskube/operator/apps/gitlab/dependent/GitlabPostgresCluster.kt
index 3dadfcd8..d5e4c42e 100644
--- a/operator/src/main/kotlin/eu/glasskube/operator/apps/gitlab/dependent/GitlabPostgresCluster.kt
+++ b/operator/src/main/kotlin/eu/glasskube/operator/apps/gitlab/dependent/GitlabPostgresCluster.kt
@@ -23,6 +23,8 @@ import eu.glasskube.operator.infra.postgres.S3Credentials
 import eu.glasskube.operator.infra.postgres.StorageConfiguration
 import eu.glasskube.operator.infra.postgres.WalBackupConfiguration
 import eu.glasskube.operator.infra.postgres.postgresCluster
+import io.fabric8.kubernetes.api.model.Quantity
+import io.fabric8.kubernetes.api.model.ResourceRequirements
 import io.javaoperatorsdk.operator.api.reconciler.Context
 import io.javaoperatorsdk.operator.api.reconciler.dependent.DependentResource
 import io.javaoperatorsdk.operator.processing.dependent.kubernetes.CRUDKubernetesDependentResource
@@ -69,6 +71,11 @@ class GitlabPostgresCluster : CRUDKubernetesDependentResource<PostgresCluster, G
                     wal = WalBackupConfiguration(compression = CompressionType.GZIP),
                     data = DataBackupConfiguration(compression = CompressionType.GZIP)
                 )
+            ),
+            resources = ResourceRequirements(
+                null,
+                mapOf("memory" to Quantity("512", "Mi")),
+                mapOf("memory" to Quantity("256", "Mi"))
             )
         )
     }
diff --git a/operator/src/main/kotlin/eu/glasskube/operator/apps/matomo/Matomo.kt b/operator/src/main/kotlin/eu/glasskube/operator/apps/matomo/Matomo.kt
index 5a5207f0..b73ce75d 100644
--- a/operator/src/main/kotlin/eu/glasskube/operator/apps/matomo/Matomo.kt
+++ b/operator/src/main/kotlin/eu/glasskube/operator/apps/matomo/Matomo.kt
@@ -3,6 +3,7 @@ package eu.glasskube.operator.apps.matomo
 import eu.glasskube.operator.resourceLabels
 import io.fabric8.generator.annotation.Nullable
 import io.fabric8.kubernetes.api.model.Namespaced
+import io.fabric8.kubernetes.api.model.Quantity
 import io.fabric8.kubernetes.api.model.ResourceRequirements
 import io.fabric8.kubernetes.client.CustomResource
 import io.fabric8.kubernetes.model.annotation.Group
@@ -13,7 +14,11 @@ data class MatomoSpec(
     val host: String? = null,
     @field:Nullable
     val smtp: MatomoSmtp? = null,
-    val resources: ResourceRequirements = ResourceRequirements()
+    val resources: ResourceRequirements = ResourceRequirements(
+        null,
+        mapOf("memory" to Quantity("600", "Mi")),
+        mapOf("memory" to Quantity("300", "Mi"))
+    )
 )
 
 class MatomoStatus {
diff --git a/operator/src/main/kotlin/eu/glasskube/operator/apps/matomo/dependent/mariadb/MatomoMariaDB.kt b/operator/src/main/kotlin/eu/glasskube/operator/apps/matomo/dependent/mariadb/MatomoMariaDB.kt
index 2b535161..f310eb1f 100644
--- a/operator/src/main/kotlin/eu/glasskube/operator/apps/matomo/dependent/mariadb/MatomoMariaDB.kt
+++ b/operator/src/main/kotlin/eu/glasskube/operator/apps/matomo/dependent/mariadb/MatomoMariaDB.kt
@@ -18,6 +18,8 @@ import eu.glasskube.operator.infra.mariadb.MariaDBVolumeClaimTemplate
 import eu.glasskube.operator.infra.mariadb.Metrics
 import eu.glasskube.operator.infra.mariadb.ServiceMonitor
 import eu.glasskube.operator.infra.mariadb.mariaDB
+import io.fabric8.kubernetes.api.model.Quantity
+import io.fabric8.kubernetes.api.model.ResourceRequirements
 import io.fabric8.kubernetes.api.model.SecretKeySelector
 import io.javaoperatorsdk.operator.api.reconciler.Context
 import io.javaoperatorsdk.operator.api.reconciler.dependent.DependentResource
@@ -56,6 +58,11 @@ class MatomoMariaDB(private val configService: ConfigService) :
                 resources = MariaDBResources(MariaDBResourcesRequest("10Gi")),
                 storageClassName = configService.getValue(ConfigKey.databaseStorageClassName)
             ),
+            resources = ResourceRequirements(
+                null,
+                mapOf("memory" to Quantity("512", "Mi")),
+                mapOf("memory" to Quantity("256", "Mi"))
+            ),
             metrics = Metrics(
                 exporter = Exporter(
                     image = MariaDBImage("prom/mysqld-exporter", "v0.14.0", "IfNotPresent")
diff --git a/operator/src/main/kotlin/eu/glasskube/operator/apps/metabase/dependent/MetabasePostgresCluster.kt b/operator/src/main/kotlin/eu/glasskube/operator/apps/metabase/dependent/MetabasePostgresCluster.kt
index c308a1fe..e95d2413 100644
--- a/operator/src/main/kotlin/eu/glasskube/operator/apps/metabase/dependent/MetabasePostgresCluster.kt
+++ b/operator/src/main/kotlin/eu/glasskube/operator/apps/metabase/dependent/MetabasePostgresCluster.kt
@@ -23,6 +23,8 @@ import eu.glasskube.operator.infra.postgres.S3Credentials
 import eu.glasskube.operator.infra.postgres.StorageConfiguration
 import eu.glasskube.operator.infra.postgres.WalBackupConfiguration
 import eu.glasskube.operator.infra.postgres.postgresCluster
+import io.fabric8.kubernetes.api.model.Quantity
+import io.fabric8.kubernetes.api.model.ResourceRequirements
 import io.javaoperatorsdk.operator.api.reconciler.Context
 import io.javaoperatorsdk.operator.api.reconciler.dependent.DependentResource
 import io.javaoperatorsdk.operator.processing.dependent.kubernetes.CRUDKubernetesDependentResource
@@ -69,6 +71,11 @@ class MetabasePostgresCluster : CRUDKubernetesDependentResource<PostgresCluster,
                     wal = WalBackupConfiguration(compression = CompressionType.GZIP),
                     data = DataBackupConfiguration(compression = CompressionType.GZIP)
                 )
+            ),
+            resources = ResourceRequirements(
+                null,
+                mapOf("memory" to Quantity("512", "Mi")),
+                mapOf("memory" to Quantity("256", "Mi"))
             )
         )
     }
diff --git a/operator/src/main/kotlin/eu/glasskube/operator/apps/odoo/dependent/OdooPostgresCluster.kt b/operator/src/main/kotlin/eu/glasskube/operator/apps/odoo/dependent/OdooPostgresCluster.kt
index cf0a1f14..86e2e9f8 100644
--- a/operator/src/main/kotlin/eu/glasskube/operator/apps/odoo/dependent/OdooPostgresCluster.kt
+++ b/operator/src/main/kotlin/eu/glasskube/operator/apps/odoo/dependent/OdooPostgresCluster.kt
@@ -23,6 +23,8 @@ import eu.glasskube.operator.infra.postgres.S3Credentials
 import eu.glasskube.operator.infra.postgres.StorageConfiguration
 import eu.glasskube.operator.infra.postgres.WalBackupConfiguration
 import eu.glasskube.operator.infra.postgres.postgresCluster
+import io.fabric8.kubernetes.api.model.Quantity
+import io.fabric8.kubernetes.api.model.ResourceRequirements
 import io.javaoperatorsdk.operator.api.reconciler.Context
 import io.javaoperatorsdk.operator.processing.dependent.kubernetes.CRUDKubernetesDependentResource
 import io.javaoperatorsdk.operator.processing.dependent.kubernetes.KubernetesDependent
@@ -65,6 +67,11 @@ class OdooPostgresCluster(private val configService: ConfigService) :
             ),
             monitoring = MonitoringConfiguration(
                 enablePodMonitor = true
+            ),
+            resources = ResourceRequirements(
+                null,
+                mapOf("memory" to Quantity("512", "Mi")),
+                mapOf("memory" to Quantity("256", "Mi"))
             )
         )
     }
diff --git a/operator/src/main/kotlin/eu/glasskube/operator/infra/mariadb/MariaDB.kt b/operator/src/main/kotlin/eu/glasskube/operator/infra/mariadb/MariaDB.kt
index 18ff9349..87498431 100644
--- a/operator/src/main/kotlin/eu/glasskube/operator/infra/mariadb/MariaDB.kt
+++ b/operator/src/main/kotlin/eu/glasskube/operator/infra/mariadb/MariaDB.kt
@@ -1,8 +1,10 @@
 package eu.glasskube.operator.infra.mariadb
 
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties
+import io.fabric8.generator.annotation.Nullable
 import io.fabric8.kubernetes.api.model.Condition
 import io.fabric8.kubernetes.api.model.Namespaced
+import io.fabric8.kubernetes.api.model.ResourceRequirements
 import io.fabric8.kubernetes.api.model.SecretKeySelector
 import io.fabric8.kubernetes.client.CustomResource
 import io.fabric8.kubernetes.model.annotation.Group
@@ -36,6 +38,8 @@ data class MariaDBSpec(
     var image: MariaDBImage,
     var port: Int = 3306,
     var volumeClaimTemplate: MariaDBVolumeClaimTemplate,
+    @field:Nullable
+    var resources: ResourceRequirements?,
     var metrics: Metrics? = null
 )
 
diff --git a/operator/src/main/kotlin/eu/glasskube/operator/infra/postgres/ClusterSpec.kt b/operator/src/main/kotlin/eu/glasskube/operator/infra/postgres/ClusterSpec.kt
index 8ef218ed..b7d6c9f9 100644
--- a/operator/src/main/kotlin/eu/glasskube/operator/infra/postgres/ClusterSpec.kt
+++ b/operator/src/main/kotlin/eu/glasskube/operator/infra/postgres/ClusterSpec.kt
@@ -3,12 +3,12 @@ package eu.glasskube.operator.infra.postgres
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties
 import com.fasterxml.jackson.annotation.JsonInclude
 import io.fabric8.kubernetes.api.model.LocalObjectReference
+import io.fabric8.kubernetes.api.model.ResourceRequirements
 
 // TODO: Add properties once needed:
 //  - certificates
 //  - serviceAccountTemplate
 //  - affinity
-//  - resources
 //  - nodeMaintenanceWindow
 //  - externalClusters
 @JsonIgnoreProperties(ignoreUnknown = true)
@@ -39,5 +39,6 @@ data class ClusterSpec(
     val primaryUpdateMethod: PrimaryUpdateMethod? = null,
     val backup: BackupConfiguration? = null,
     val logLevel: LogLevel? = null,
-    val monitoring: MonitoringConfiguration? = null
+    val monitoring: MonitoringConfiguration? = null,
+    val resources: ResourceRequirements? = null
 )