diff --git a/data/common/cassandra.yaml b/data/common/cassandra.yaml
index d472423f..5e8239f9 100644
--- a/data/common/cassandra.yaml
+++ b/data/common/cassandra.yaml
@@ -1,87 +1,88 @@
 cassandra::base_data_directory: /srv/cassandra
 cassandra::base_config_directory: /etc/cassandra
 cassandra::base_log_directory: /var/log/cassandra
 
 cassandra::version: 4.0.5
 
 cassandra::listen_network: "%{lookup('internal_network')}"
 
 cassandra::nodes:
   cassandra01.internal.softwareheritage.org:
     instances:
       instance1:
         cluster_name: archive_production
   cassandra02.internal.softwareheritage.org:
     instances:
       instance1:
         cluster_name: archive_production
   cassandra03.internal.softwareheritage.org:
     instances:
       instance1:
         cluster_name: archive_production
   cassandra04.internal.softwareheritage.org:
     instances:
       instance1:
         cluster_name: archive_production
   cassandra05.internal.softwareheritage.org:
     instances:
       instance1:
         cluster_name: archive_production
   cassandra06.internal.softwareheritage.org:
     instances:
       instance1:
         cluster_name: archive_production
 
 cassandra::clusters:
   archive_production:
     seed_provider:
       - class_name: org.apache.cassandra.locator.SimpleSeedProvider
         parameters:
           - seeds: "cassandra01.internal.softwareheritage.org:7000"
 
 cassandra::default_instance_configuration:
   cluster_name: "%{lookup('cassandra::default_cluster_name')}"
   datacenter: "%{::subnet}"
   # rack: "%{::hostname}"
   rack: rack1
   native_transport_port: 9042
   storage_port: 7000
   jmx_port: 7199
   jmx_exporter_port: 7070
   jmx_remote: true
   jmx_user: "%{lookup('cassandra::jmx::user')}"
   jmx_password: "%{lookup('cassandra::jmx::password')}"
   heap: "%{lookup('cassandra::heap')}"
 
 cassandra::jmx::user: cassandra
-cassandra::heap: 16G
+cassandra::heap: 32G
 
 # cassandra::jmx::password in private data
 
 # Reflect the base of the cassandra.yaml content
 # These list is completed and/or overridden in cassandra::instance
 cassandra::base_instance_configuration:
   num_tokens: 16
   allocate_tokens_for_local_replication_factor: 3
   disk_optimization_strategy: ssd
   concurrent_compactors: 4 # should be min(nb core, nb disks)
   internode_compression: dc # default dc possible all|dc|none
   concurrent_reads: 64 # 16 x number of drives
   concurrent_writes: 128 # 8 x number of cores
   concurrent_counter_writes: 48
   commitlog_sync: periodic # default periodic
   commitlog_sync_period_in_ms: 10000 # default 10000
   commitlog_total_space_in_mb: 16384 # default 8192
   commitlog_segment_size_in_mb: 256 # default 32 (due to oversize mutation on revision table)
   partitioner: org.apache.cassandra.dht.Murmur3Partitioner
   endpoint_snitch: GossipingPropertyFileSnitch
   enable_user_defined_functions: true # needed by swh-storage
   compaction_throughput_mb_per_sec: 160
   read_request_timeout_in_ms: 5000
   range_request_timeout_in_ms: 10000
   write_request_timeout_in_ms: 2000
   counter_write_request_timeout_in_ms: 5000
   cas_contention_timeout_in_ms: 1000
   truncate_request_timeout_in_ms: 60000
   request_timeout_in_ms: 10000
   slow_query_log_timeout_in_ms: 1000
+  repair_session_space_in_mb: 1024