diff --git a/app/matrix/lib/matrix-ng.libsonnet b/app/matrix/lib/matrix-ng.libsonnet
index ac895bc1..91c92d2f 100644
--- a/app/matrix/lib/matrix-ng.libsonnet
+++ b/app/matrix/lib/matrix-ng.libsonnet
@@ -242,6 +242,7 @@ local coturn = import "./coturn.libsonnet";
             opts: {
                 max_connections: "300",
                 shared_buffers: "80MB",
+                wal_level: "logical",
             },
         },
     },
diff --git a/app/matrix/matrix.hackerspace.pl.jsonnet b/app/matrix/matrix.hackerspace.pl.jsonnet
index 4199e0e4..931901a6 100644
--- a/app/matrix/matrix.hackerspace.pl.jsonnet
+++ b/app/matrix/matrix.hackerspace.pl.jsonnet
@@ -1,6 +1,7 @@
 local matrix = import "lib/matrix-ng.libsonnet";
 local irc = import "lib/appservice-irc.libsonnet";
 local telegram = import "lib/appservice-telegram.libsonnet";
+local kube = import "../../kube/kube.libsonnet";
 
 matrix {
     local app = self,
@@ -77,12 +78,24 @@ matrix {
                 },
             },
         },
+        // local changes
+        main+: {
+            deployment+: {
+                cfg+: {
+                    resources+: {
+                        limits+: { cpu: "2", memory: "8Gi" },
+                        requests+: { cpu: "2", memory: "8Gi" },
+                    },
+                },
+            },
+        },
     },
 
     // Bump up storage to 200Gi from default 100Gi, use different name.  The
     // new name corresponds to a manually migrated and sized-up PVC that
     // contains data from the original waw3-postgres PVC.
     postgres3+: {
+        local psql = self,
         volumeClaim+: {
             metadata+: {
                 name: "waw3-postgres-2",
@@ -95,6 +108,36 @@ matrix {
                 },
             },
         },
+        tempVC: kube.PersistentVolumeClaim(psql.makeName("tempvc")) {
+            metadata+: psql.metadata,
+            spec+: {
+                storageClassName: psql.cfg.storageClassName,
+                accessModes: [ "ReadWriteOnce" ],
+                resources: {
+                    requests: {
+                        storage: "200Gi",
+                    },
+                },
+            },
+        },
+        deployment+: {
+            spec+: {
+                template+: {
+                    spec+: {
+                        volumes_+: {
+                            temp: kube.PersistentVolumeClaimVolume(psql.tempVC),
+                        },
+                        containers_+: {
+                            postgres+: {
+                                volumeMounts_+: {
+                                    temp: { mountPath: "/mnt/tmp/" },
+                                },
+                            },
+                        },
+                    },
+                },
+            },
+        },
     },
 
     appservices: {