diff --git a/s3config.release.yaml.sample b/s3config.release.yaml.sample
index 07d2b8482..72b6510af 100644
--- a/s3config.release.yaml.sample
+++ b/s3config.release.yaml.sample
@@ -114,7 +114,7 @@ S3_MOTR_CONFIG:                                     # Section for S3 Motr
    S3_UNIT_SIZES_FOR_MEMORY_POOL: [16384]            # Memory pool will be created for each of these unit_size with following properties
    S3_MOTR_READ_POOL_INITIAL_BUFFER_COUNT: 10        # 10 blocks, the initial pool size = multiple of S3_MOTR_UNIT_SIZE
    S3_MOTR_READ_POOL_EXPANDABLE_COUNT: 50            # 50 blocks, pool's expandable size, multiple of S3_MOTR_UNIT_SIZE
-   S3_MOTR_READ_POOL_MAX_THRESHOLD: 1048576000        # 1GB, The maximum memory threshold for the pool, multiple of S3_MOTR_UNIT_SIZE
+   S3_MOTR_READ_POOL_MAX_THRESHOLD: 524288000        # 500MB, The maximum memory threshold for the pool, multiple of S3_MOTR_UNIT_SIZE
    S3_MOTR_READ_MEMPOOL_ZERO_BUFFER: false           # Enable Motr Mempool 'zeroing' after use (like secure erase) - disabled by default
    S3_MOTR_OPERATION_WAIT_PERIOD: 90                  # 90 s, Maximum wait duration for sync motr operations.
    S3_MOTR_FIRST_READ_SIZE: 4                         # Size in MB of the First Read Request to MOTR
diff --git a/scripts/provisioning/configcmd.py b/scripts/provisioning/configcmd.py
index a24c91991..ba76b655c 100644
--- a/scripts/provisioning/configcmd.py
+++ b/scripts/provisioning/configcmd.py
@@ -52,6 +52,8 @@ def __init__(self, config: str, services: str = None):
       super(ConfigCmd, self).__init__(config, services)
       self.setup_type = self.get_confvalue_with_defaults('CONFIG>CONFSTORE_SETUP_TYPE')
       Log.info(f'Setup type : {self.setup_type}')
+      self.setup_size = self.get_confvalue_with_defaults('CONFIG>CONFSTORE_SETUP_SIZE')
+      Log.info(f'Setup type : {self.setup_size}')
       self.cluster_id = self.get_confvalue_with_defaults('CONFIG>CONFSTORE_CLUSTER_ID_KEY')
       Log.info(f'Cluster  id : {self.cluster_id}')
       self.base_config_file_path = self.get_confvalue_with_defaults('CONFIG>CONFSTORE_BASE_CONFIG_PATH')
@@ -157,6 +159,11 @@ def process_s3server(self):
                                 'yaml://')
     Log.info("validate s3 config files completed")
 
+    # update memory limits
+    Log.info("updating memory limits started")
+    self.update_memory_limits()
+    Log.info("updating memory limits complete")
+
     Log.info("create symbolic link of FID config files started")
     self.create_symbolic_link_fid()
     Log.info("create symbolic link of FID config files started")
@@ -558,6 +565,33 @@ def update_s3_server_configs(self):
     self.update_config_value("S3_CONFIG_FILE", "yaml", "CONFIG>CONFSTORE_S3_MOTR_MAX_START_TIMEOUT", "S3_MOTR_CONFIG>S3_MOTR_INIT_MAX_TIMEOUT")
     Log.info("Update s3 server config file completed")
 
+  def update_memory_limits(self):
+    """ Update memory buffer sizes."""
+    Log.info("Update memory buffer sizes started")
+    # validate config file exists - /etc/cortx/s3/conf/s3config.yaml
+    configfile = self.get_confkey("S3_CONFIG_FILE").replace("/opt/seagate/cortx", self.base_config_file_path)
+    if path.isfile(f'{configfile}') == False:
+      Log.error(f'{configfile} file is not present')
+      raise S3PROVError(f'{configfile} file is not present')
+
+    # load config file, read required keysand modify as per size
+    s3configfileconfstore = S3CortxConfStore(f'yaml://{configfile}', 'update_limits')
+    libevent_pool_initial_size = int(s3configfileconfstore.get_config("S3_THIRDPARTY_CONFIG>S3_LIBEVENT_POOL_INITIAL_SIZE"))
+    libevent_pool_max_threshold = int(s3configfileconfstore.get_config("S3_THIRDPARTY_CONFIG>S3_LIBEVENT_POOL_MAX_THRESHOLD"))
+    if "small" == self.setup_size:
+      libevent_pool_initial_size = int(libevent_pool_initial_size / 2);
+      libevent_pool_max_threshold = int(libevent_pool_max_threshold / 2);
+    elif "medium" == self.setup_size:
+      libevent_pool_initial_size = int((libevent_pool_initial_size * 3) / 4);
+      libevent_pool_max_threshold = int((libevent_pool_max_threshold * 3) / 4);
+    else:
+      libevent_pool_initial_size = libevent_pool_initial_size
+      libevent_pool_max_threshold = libevent_pool_max_threshold
+    s3configfileconfstore.set_config("S3_THIRDPARTY_CONFIG>S3_LIBEVENT_POOL_INITIAL_SIZE", libevent_pool_initial_size, True)
+    s3configfileconfstore.set_config("S3_THIRDPARTY_CONFIG>S3_LIBEVENT_POOL_MAX_THRESHOLD", libevent_pool_max_threshold, True)
+
+    Log.info("Update memory buffer sizes completed")
+
   def update_s3_bgdelete_bind_port(self, value_to_update, additional_param):
     if isinstance(value_to_update, str):
       value_to_update = literal_eval(value_to_update)
diff --git a/scripts/provisioning/s3_prov_config.yaml b/scripts/provisioning/s3_prov_config.yaml
index b73e8db8c..9359fe6a0 100644
--- a/scripts/provisioning/s3_prov_config.yaml
+++ b/scripts/provisioning/s3_prov_config.yaml
@@ -34,6 +34,8 @@ PREPARE:
 CONFIG:
   # Public keys which came from provisioner which may or may not have default values.
   CONFSTORE_SETUP_TYPE: "cortx>common>setup_type" #M (Usedby : s3_deployment)
+  CONFSTORE_SETUP_SIZE: "cortx>common>setup_size" #O (Usedby : s3_deployment)
+
   CONFSTORE_BASE_LOG_PATH: "cortx>common>storage>log" #M (Usedby : all)
   CONFSTORE_S3_SECURITY_CERTIFICATE: "cortx>common>security>ssl_certificate" #O default - /etc/ssl/stx/stx.pem (Usedby : s3_deployment, haproxy)
   #CONFSTORE_S3_STORAGE_MISC: "cortx>common>storage>misc" #O default - /var/data/cortx (Usedby : none)
@@ -106,6 +108,7 @@ TEST:
 DEFAULT_POST_INSTALL:
 DEFAULT_PREPARE:
 DEFAULT_CONFIG:
+  CONFSTORE_SETUP_SIZE: "large"
   CONFSTORE_LDAPADMIN_USER_KEY: "sgiamadmin"
   CONFSTORE_S3_MOTR_MAX_UNITS_PER_REQUEST : "8"
   CONFSTORE_S3_MOTR_MAX_START_TIMEOUT : "240"