diff --git a/changelog.md b/changelog.md
index 9147eb029..daa705c8c 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,6 +1,6 @@
 # Version 3.21.0 (15.12.2023)
 ## Core
-- [fea] Added [subqueries](#subqueries-nested-queries) support (`explain` for subqueries will be implemented in the next releases)
+- [fea] Added [subqueries](#subqueries-nested-queries) support (`explain` for subqueries will be implement in the next releases)
 - [fea] Added backtraces/minidump support for Windows platform
 - [fea] Added query crash tracker support for Windows platform
 - [fix] Added explicit error for aggregations in joined queries
@@ -16,8 +16,8 @@
 
 ## Go connector
 - [fea] Added Go API and DSL-convertor for subqueries
-- [fea] Changed CJSON-to-object conversion logic for slices: now the single JSON values and fields with multiple JSON-paths will be concatenated together in the target field
-- [fea] Added `WithStrictJoinHandlers`. This option allows to validate JoinHandlers usage at runtime
+- [fea] Changed CJSON-to-object convetrion logic for slices: now the single JSON values and fields with multiple JSON-paths will be concatenated together in the target field
+- [fea] Added `WithStrictJoinHandlers`. This option allows to validate JoinHandlers usage in runtime
 - [fix] Fixed panic handling in the CJSON deserialization
 - [fix] Fixed logging in `cproto`-binding. Error messages will no longer be redirected to stdout instead of user's logger
 
@@ -25,7 +25,7 @@
 - [fea] Saved the scroll position on the sorting
 - [fea] Changed the Server ID range
 - [fea] Improved the notification about the supported browsers
-- [fea] Added the default values to the config form when the default config is used
+- [fea] Added the default values to the config form when the default config is using
 - [fix] Fixed the wrong redirect to a fake database
 - [fix] Fixed the column order changing on the data sorting
 - [fix] Fixed the horizontal scroll on the data sorting
diff --git a/cpp_src/cmd/reindexer_server/contrib/Dockerfile b/cpp_src/cmd/reindexer_server/contrib/Dockerfile
index 8eb80a77c..94681c300 100644
--- a/cpp_src/cmd/reindexer_server/contrib/Dockerfile
+++ b/cpp_src/cmd/reindexer_server/contrib/Dockerfile
@@ -3,7 +3,7 @@ FROM alpine:3.14 AS build
 RUN cd /tmp && apk update && \
     apk add git curl autoconf automake libtool linux-headers g++ make libunwind-dev grpc-dev grpc protobuf-dev c-ares-dev && \
     git clone https://github.com/gperftools/gperftools.git && \
-    cd gperftools && \
+    cd gperftools &&  git checkout gperftools-2.13 && \
     echo "noinst_PROGRAMS =" >> Makefile.am && \
     sed -i s/_sigev_un\._tid/sigev_notify_thread_id/ src/profile-handler.cc && \
     ./autogen.sh &&  ./configure --disable-dependency-tracking && make -j8 && make install
diff --git a/cpp_src/cmd/reindexer_server/test/test_storage_compatibility.sh b/cpp_src/cmd/reindexer_server/test/test_storage_compatibility.sh
new file mode 100755
index 000000000..d189d3841
--- /dev/null
+++ b/cpp_src/cmd/reindexer_server/test/test_storage_compatibility.sh
@@ -0,0 +1,195 @@
+#!/bin/bash
+# Task: https://github.com/restream/reindexer/-/issues/1188
+set -e
+
+function KillAndRemoveServer {
+	local pid=$1
+	kill $pid
+	wait $pid
+	yum remove -y 'reindexer*' > /dev/null
+}
+
+function WaitForDB {
+	# wait until DB is loaded
+	set +e # disable "exit on error" so the script won't stop when DB's not loaded yet
+	is_connected=$(reindexer_tool --dsn $ADDRESS --command '\databases list');
+	while [[ $is_connected != "test" ]]
+		do
+			sleep 2
+			is_connected=$(reindexer_tool --dsn $ADDRESS --command '\databases list');
+		done
+	set -e
+}
+
+function CompareNamespacesLists {
+	local ns_list_actual=$1
+	local ns_list_expected=$2
+	local pid=$3
+
+	diff=$(echo ${ns_list_actual[@]} ${ns_list_expected[@]} | tr ' ' '\n' | sort | uniq -u) # compare in any order
+	if [ "$diff" == "" ]; then
+	    echo "## PASS: namespaces list not changed"
+	else
+	    echo "##### FAIL: namespaces list was changed"
+	    echo "expected: $ns_list_expected"
+	    echo "actual: $ns_list_actual"
+		KillAndRemoveServer $pid;
+	    exit 1
+    fi
+}
+
+function CompareMemstats {
+	local actual=$1
+	local expected=$2
+	local pid=$3
+	diff=$(echo ${actual[@]} ${expected[@]} | tr ' ' '\n' | sed 's/\(.*\),$/\1/' | sort | uniq -u) # compare in any order
+	if [ "$diff" == "" ]; then
+	    echo "## PASS: memstats not changed"
+	else
+	    echo "##### FAIL: memstats was changed"
+	    echo "expected: $expected"
+	    echo "actual: $actual"
+		KillAndRemoveServer $pid;
+	    exit 1
+    fi
+}
+
+
+RX_SERVER_CURRENT_VERSION_RPM="$(basename build/reindexer-*server*.rpm)"
+VERSION_FROM_RPM=$(echo "$RX_SERVER_CURRENT_VERSION_RPM" | grep -o '.*server-..')
+VERSION=$(echo ${VERSION_FROM_RPM: -2:1})   # one-digit version
+
+echo "## choose latest release rpm file"
+if [ $VERSION == 3 ]; then
+  LATEST_RELEASE=$(python3 cpp_src/cmd/reindexer_server/test/get_last_rx_version.py -v 3)
+  namespaces_list_expected=$'purchase_options_ext_dict\nchild_account_recommendations\n#config\n#activitystats\nradio_channels\ncollections\n#namespaces\nwp_imports_tasks\nepg_genres\nrecom_media_items_personal\nrecom_epg_archive_default\n#perfstats\nrecom_epg_live_default\nmedia_view_templates\nasset_video_servers\nwp_tasks_schedule\nadmin_roles\n#clientsstats\nrecom_epg_archive_personal\nrecom_media_items_similars\nmenu_items\naccount_recommendations\nkaraoke_items\nmedia_items\nbanners\n#queriesperfstats\nrecom_media_items_default\nrecom_epg_live_personal\nservices\n#memstats\nchannels\nmedia_item_recommendations\nwp_tasks_tasks\nepg'
+elif [ $VERSION == 4 ]; then
+  LATEST_RELEASE=$(python3 cpp_src/cmd/reindexer_server/test/get_last_rx_version.py -v 4)
+  # replicationstats ns added for v4
+  namespaces_list_expected=$'purchase_options_ext_dict\nchild_account_recommendations\n#config\n#activitystats\n#replicationstats\nradio_channels\ncollections\n#namespaces\nwp_imports_tasks\nepg_genres\nrecom_media_items_personal\nrecom_epg_archive_default\n#perfstats\nrecom_epg_live_default\nmedia_view_templates\nasset_video_servers\nwp_tasks_schedule\nadmin_roles\n#clientsstats\nrecom_epg_archive_personal\nrecom_media_items_similars\nmenu_items\naccount_recommendations\nkaraoke_items\nmedia_items\nbanners\n#queriesperfstats\nrecom_media_items_default\nrecom_epg_live_personal\nservices\n#memstats\nchannels\nmedia_item_recommendations\nwp_tasks_tasks\nepg'
+else
+  echo "Unknown version"
+  exit 1
+fi
+
+echo "## downloading latest release rpm file: $LATEST_RELEASE"
+curl "http://repo.itv.restr.im/itv-api-ng/7/x86_64/$LATEST_RELEASE" --output $LATEST_RELEASE;
+echo "## downloading example DB"
+curl "https://git.restream.ru/MaksimKravchuk/reindexer_testdata/-/raw/master/big.zip" --output big.zip;
+unzip -o big.zip # unzips into mydb_big.rxdump;
+
+ADDRESS="cproto://127.0.0.1:6534/"
+DB_NAME="test"
+
+memstats_expected=$'[
+{"replication":{"data_hash":24651210926,"data_count":3}},
+{"replication":{"data_hash":6252344969,"data_count":1}},
+{"replication":{"data_hash":37734732881,"data_count":28}},
+{"replication":{"data_hash":0,"data_count":0}},
+{"replication":{"data_hash":1024095024522,"data_count":1145}},
+{"replication":{"data_hash":8373644068,"data_count":1315}},
+{"replication":{"data_hash":0,"data_count":0}},
+{"replication":{"data_hash":0,"data_count":0}},
+{"replication":{"data_hash":0,"data_count":0}},
+{"replication":{"data_hash":0,"data_count":0}},
+{"replication":{"data_hash":7404222244,"data_count":97}},
+{"replication":{"data_hash":94132837196,"data_count":4}},
+{"replication":{"data_hash":1896088071,"data_count":2}},
+{"replication":{"data_hash":0,"data_count":0}},
+{"replication":{"data_hash":-672103903,"data_count":33538}},
+{"replication":{"data_hash":0,"data_count":0}},
+{"replication":{"data_hash":6833710705,"data_count":1}},
+{"replication":{"data_hash":5858155773472,"data_count":4500}},
+{"replication":{"data_hash":-473221280268823592,"data_count":65448}},
+{"replication":{"data_hash":0,"data_count":0}},
+{"replication":{"data_hash":8288213744,"data_count":3}},
+{"replication":{"data_hash":0,"data_count":0}},
+{"replication":{"data_hash":0,"data_count":0}},
+{"replication":{"data_hash":354171024786967,"data_count":3941}},
+{"replication":{"data_hash":-6520334670,"data_count":35886}},
+{"replication":{"data_hash":112772074632,"data_count":281}},
+{"replication":{"data_hash":-12679568198538,"data_count":1623116}}
+]
+Returned 27 rows'
+
+echo "##### Forward compatibility test #####"
+
+DB_PATH=$(pwd)"/rx_db"
+
+echo "Database: "$DB_PATH
+
+echo "## installing latest release: $LATEST_RELEASE"
+yum install -y $LATEST_RELEASE > /dev/null;
+# run RX server with disabled logging
+reindexer_server -l warning --httplog=none --rpclog=none --db $DB_PATH &
+server_pid=$!
+sleep 2;
+
+reindexer_tool --dsn $ADDRESS$DB_NAME -f mydb_big.rxdump --createdb;
+sleep 1;
+
+namespaces_1=$(reindexer_tool --dsn $ADDRESS$DB_NAME --command '\namespaces list');
+echo $namespaces_1;
+CompareNamespacesLists "${namespaces_1[@]}" "${namespaces_list_expected[@]}" $server_pid;
+
+memstats_1=$(reindexer_tool --dsn $ADDRESS$DB_NAME --command 'select replication.data_hash, replication.data_count from #memstats');
+CompareMemstats "${memstats_1[@]}" "${memstats_expected[@]}" $server_pid;
+
+KillAndRemoveServer $server_pid;
+
+echo "## installing current version: $RX_SERVER_CURRENT_VERSION_RPM"
+yum install -y build/*.rpm > /dev/null;
+reindexer_server -l0  --corelog=none --httplog=none --rpclog=none --db $DB_PATH &
+server_pid=$!
+sleep 2;
+
+WaitForDB
+
+namespaces_2=$(reindexer_tool --dsn $ADDRESS$DB_NAME --command '\namespaces list');
+echo $namespaces_2;
+CompareNamespacesLists "${namespaces_2[@]}" "${namespaces_1[@]}" $server_pid;
+
+memstats_2=$(reindexer_tool --dsn $ADDRESS$DB_NAME --command 'select replication.data_hash, replication.data_count from #memstats');
+CompareMemstats "${memstats_2[@]}" "${memstats_1[@]}" $server_pid;
+
+KillAndRemoveServer $server_pid;
+rm -rf $DB_PATH;
+sleep 1;
+
+echo "##### Backward compatibility test #####"
+
+echo "## installing current version: $RX_SERVER_CURRENT_VERSION_RPM"
+yum install -y build/*.rpm > /dev/null;
+reindexer_server -l warning --httplog=none --rpclog=none --db $DB_PATH &
+server_pid=$!
+sleep 2;
+
+reindexer_tool --dsn $ADDRESS$DB_NAME -f mydb_big.rxdump --createdb;
+sleep 1;
+
+namespaces_3=$(reindexer_tool --dsn $ADDRESS$DB_NAME --command '\namespaces list');
+echo $namespaces_3;
+CompareNamespacesLists "${namespaces_3[@]}" "${namespaces_list_expected[@]}" $server_pid;
+
+memstats_3=$(reindexer_tool --dsn $ADDRESS$DB_NAME --command 'select replication.data_hash, replication.data_count from #memstats');
+CompareMemstats "${memstats_3[@]}" "${memstats_expected[@]}" $server_pid;
+
+KillAndRemoveServer $server_pid;
+
+echo "## installing latest release: $LATEST_RELEASE"
+yum install -y $LATEST_RELEASE > /dev/null;
+reindexer_server -l warning --httplog=none --rpclog=none --db $DB_PATH &
+server_pid=$!
+sleep 2;
+
+WaitForDB
+
+namespaces_4=$(reindexer_tool --dsn $ADDRESS$DB_NAME --command '\namespaces list');
+echo $namespaces_4;
+CompareNamespacesLists "${namespaces_4[@]}" "${namespaces_3[@]}" $server_pid;
+
+memstats_4=$(reindexer_tool --dsn $ADDRESS$DB_NAME --command 'select replication.data_hash, replication.data_count from #memstats');
+CompareMemstats "${memstats_4[@]}" "${memstats_3[@]}" $server_pid;
+
+KillAndRemoveServer $server_pid;
+rm -rf $DB_PATH;
diff --git a/cpp_src/server/httpserver.cc b/cpp_src/server/httpserver.cc
index 87cd16189..f0a2c65cd 100644
--- a/cpp_src/server/httpserver.cc
+++ b/cpp_src/server/httpserver.cc
@@ -22,6 +22,7 @@
 #include "resources_wrapper.h"
 #include "statscollect/istatswatcher.h"
 #include "statscollect/prometheus.h"
+#include "tools/alloc_ext/je_malloc_extension.h"
 #include "tools/alloc_ext/tc_malloc_extension.h"
 #include "tools/flagguard.h"
 #include "tools/fsops.h"