diff --git a/data/hostname/search-esnode2.internal.softwareheritage.org.yaml b/data/hostname/search-esnode2.internal.softwareheritage.org.yaml
index fcfe7272..1bae6a9a 100644
--- a/data/hostname/search-esnode2.internal.softwareheritage.org.yaml
+++ b/data/hostname/search-esnode2.internal.softwareheritage.org.yaml
@@ -1,30 +1,30 @@
 swh::apt_config::enable_non_free: true
 swh::apt_config::backported_packages:
   buster:
     - linux-image-amd64
     - linux-headers-amd64
     - libnvpair1linux
     - libuutil1linux
     - libzfs2linux
     - libzpool2linux
     - zfs-dkms
     - zfsutils-linux
     - zfs-zed
 
 elastic::elk_version: '7.9.3'
 
 # Elasticsearch
 elasticsearch::config::cluster::name: swh-search
 
 elasticsearch::config::discovery::seed_hosts:
   - search-esnode1.internal.softwareheritage.org
   - search-esnode2.internal.softwareheritage.org
   - search-esnode3.internal.softwareheritage.org
 
 elasticsearch::config::cluster::initial_master_nodes:
   - search-esnode1
   - search-esnode2
   - search-esnode3
 
-# elasticsearch::jvm_options::heap_size: 8g
+elasticsearch::jvm_options::heap_size: 8g
 elasticsearch::config::prometheus::indices: true
diff --git a/data/hostname/search-esnode3.internal.softwareheritage.org.yaml b/data/hostname/search-esnode3.internal.softwareheritage.org.yaml
index fcfe7272..1bae6a9a 100644
--- a/data/hostname/search-esnode3.internal.softwareheritage.org.yaml
+++ b/data/hostname/search-esnode3.internal.softwareheritage.org.yaml
@@ -1,30 +1,30 @@
 swh::apt_config::enable_non_free: true
 swh::apt_config::backported_packages:
   buster:
     - linux-image-amd64
     - linux-headers-amd64
     - libnvpair1linux
     - libuutil1linux
     - libzfs2linux
     - libzpool2linux
     - zfs-dkms
     - zfsutils-linux
     - zfs-zed
 
 elastic::elk_version: '7.9.3'
 
 # Elasticsearch
 elasticsearch::config::cluster::name: swh-search
 
 elasticsearch::config::discovery::seed_hosts:
   - search-esnode1.internal.softwareheritage.org
   - search-esnode2.internal.softwareheritage.org
   - search-esnode3.internal.softwareheritage.org
 
 elasticsearch::config::cluster::initial_master_nodes:
   - search-esnode1
   - search-esnode2
   - search-esnode3
 
-# elasticsearch::jvm_options::heap_size: 8g
+elasticsearch::jvm_options::heap_size: 8g
 elasticsearch::config::prometheus::indices: true