diff --git a/validator-engine/validator-engine.cpp b/validator-engine/validator-engine.cpp
index f83f978ed..897e3c53b 100644
--- a/validator-engine/validator-engine.cpp
+++ b/validator-engine/validator-engine.cpp
@@ -3897,7 +3897,7 @@ int main(int argc, char *argv[]) {
     acts.push_back([&x, v]() { td::actor::send_closure(x, &ValidatorEngine::set_max_mempool_num, v); });
     return td::Status::OK();
   });
-  p.add_checked_option('b', "block-ttl", "blocks will be gc'd after this time (in seconds) default=7*86400",
+  p.add_checked_option('b', "block-ttl", "blocks will be gc'd after this time (in seconds) default=86400",
                        [&](td::Slice fname) {
                          auto v = td::to_double(fname);
                          if (v <= 0) {
@@ -3907,7 +3907,7 @@ int main(int argc, char *argv[]) {
                          return td::Status::OK();
                        });
   p.add_checked_option(
-      'A', "archive-ttl", "archived blocks will be deleted after this time (in seconds) default=365*86400",
+      'A', "archive-ttl", "archived blocks will be deleted after this time (in seconds) default=7*86400",
       [&](td::Slice fname) {
         auto v = td::to_double(fname);
         if (v <= 0) {
@@ -4020,7 +4020,7 @@ int main(int argc, char *argv[]) {
     acts.push_back([&x]() { td::actor::send_closure(x, &ValidatorEngine::set_nonfinal_ls_queries_enabled); });
   });
   p.add_checked_option(
-      '\0', "celldb-cache-size", "block cache size for RocksDb in CellDb, in bytes (default: 50G)",
+      '\0', "celldb-cache-size", "block cache size for RocksDb in CellDb, in bytes (default: 1G)",
       [&](td::Slice s) -> td::Status {
         TRY_RESULT(v, td::to_integer_safe<td::uint64>(s));
         if (v == 0) {
@@ -4030,12 +4030,12 @@ int main(int argc, char *argv[]) {
         return td::Status::OK();
       });
   p.add_option(
-      '\0', "celldb-no-direct-io", "disable direct I/O mode for RocksDb in CellDb (forced when celldb cache is < 30G)",
-      [&]() { acts.push_back([&x]() { td::actor::send_closure(x, &ValidatorEngine::set_celldb_direct_io, false); }); });
+      '\0', "celldb-direct-io", "enable direct I/O mode for RocksDb in CellDb (doesn't apply when celldb cache is < 30G)",
+      [&]() { acts.push_back([&x]() { td::actor::send_closure(x, &ValidatorEngine::set_celldb_direct_io, true); }); });
   p.add_option(
-      '\0', "celldb-no-preload-all",
-      "disable preloading all cells from CellDb on startup (enabled by default)",
-      [&]() { acts.push_back([&x]() { td::actor::send_closure(x, &ValidatorEngine::set_celldb_preload_all, false); }); });
+      '\0', "celldb-preload-all",
+      "preload all cells from CellDb on startup (recommended to use with big enough celldb-cache-size and celldb-direct-io)",
+      [&]() { acts.push_back([&x]() { td::actor::send_closure(x, &ValidatorEngine::set_celldb_preload_all, true); }); });
   p.add_checked_option(
       '\0', "catchain-max-block-delay", "delay before creating a new catchain block, in seconds (default: 0.5)",
       [&](td::Slice s) -> td::Status {
diff --git a/validator-engine/validator-engine.hpp b/validator-engine/validator-engine.hpp
index 877a2be52..8adc8d9a7 100644
--- a/validator-engine/validator-engine.hpp
+++ b/validator-engine/validator-engine.hpp
@@ -211,9 +211,9 @@ class ValidatorEngine : public td::actor::Actor {
   double archive_preload_period_ = 0.0;
   bool disable_rocksdb_stats_ = false;
   bool nonfinal_ls_queries_enabled_ = false;
-  td::optional<td::uint64> celldb_cache_size_ = 50LL << 30;
-  bool celldb_direct_io_ = true;
-  bool celldb_preload_all_ = true;
+  td::optional<td::uint64> celldb_cache_size_ = 1LL << 30;
+  bool celldb_direct_io_ = false;
+  bool celldb_preload_all_ = false;
   td::optional<double> catchain_max_block_delay_;
   bool read_config_ = false;
   bool started_keyring_ = false;
diff --git a/validator/validator.h b/validator/validator.h
index b64cfb51d..9082fd882 100644
--- a/validator/validator.h
+++ b/validator/validator.h
@@ -125,8 +125,8 @@ struct ValidatorManagerOptions : public td::CntObject {
       BlockIdExt zero_block_id, BlockIdExt init_block_id,
       std::function<bool(ShardIdFull, CatchainSeqno, ShardCheckMode)> check_shard = [](ShardIdFull, CatchainSeqno,
                                                                                        ShardCheckMode) { return true; },
-      bool allow_blockchain_init = false, double sync_blocks_before = 86400, double block_ttl = 86400 * 7,
-      double state_ttl = 3600, double archive_ttl = 86400 * 365, double key_proof_ttl = 86400 * 3650,
+      bool allow_blockchain_init = false, double sync_blocks_before = 3600, double block_ttl = 86400,
+      double state_ttl = 3600, double archive_ttl = 86400 * 7, double key_proof_ttl = 86400 * 3650,
       double max_mempool_num = 999999,
       bool initial_sync_disabled = false);
 };