**Use case**

If FixedString is used with more than 256 bytes in size, it is suspicious and most likely indicates misusage.
Forbid this by default and add a setting to override it; ATTACH queries should allow creating tables nevertheless.

See also: `allow_suspicious_low_cardinality_types`.

M(UInt64, hsts_max_age, 0, "Expired time for hsts. 0 means disable HSTS.", 0) \
    M(Bool, extremes, false, "Calculate minimums and maximums of the result columns. They can be output in JSON-formats.", IMPORTANT) \
    M(Bool, use_uncompressed_cache, false, "Whether to use the cache of uncompressed blocks.", 0) \
    M(Bool, replace_running_query, false, "Whether the running request should be canceled with the same id as the new one.", 0) \
    M(UInt64, max_replicated_fetches_network_bandwidth_for_server, 0, "The maximum speed of data exchange over the network in bytes per second for replicated fetches. Zero means unlimited. Only has meaning at server startup.", 0) \
    M(UInt64, max_replicated_sends_network_bandwidth_for_server, 0, "The maximum speed of data exchange over the network in bytes per second for replicated sends. Zero means unlimited. Only has meaning at server startup.", 0) \
    M(UInt64, max_remote_read_network_bandwidth_for_server, 0, "The maximum speed of data exchange over the network in bytes per second for read. Zero means unlimited. Only has meaning at server startup.", 0) \
    M(UInt64, max_remote_write_network_bandwidth_for_server, 0, "The maximum speed of data exchange over the network in bytes per second for write. Zero means unlimited. Only has meaning at server startup.", 0) \
    M(Bool, stream_like_engine_allow_direct_select, false, "Allow direct SELECT query for Kafka, RabbitMQ, FileLog, Redis Streams and NATS engines. In case there are attached materialized views, SELECT query is not allowed even if this setting is enabled.", 0) \
    M(String, stream_like_engine_insert_queue, "", "When stream like engine reads from multiple queues, user will need to select one queue to insert into when writing. Used by Redis Streams and NATS.", 0) \
    \
    M(Milliseconds, distributed_directory_monitor_sleep_time_ms, 100, "Sleep time for StorageDistributed DirectoryMonitors, in case of any errors delay grows exponentially.", 0) \
    M(Milliseconds, distributed_directory_monitor_max_sleep_time_ms, 30000, "Maximum sleep time for StorageDistributed DirectoryMonitors, it limits exponential growth too.", 0) \
    \
    M(Bool, distributed_directory_monitor_batch_inserts, false, "Should StorageDistributed DirectoryMonitors try to batch individual inserts into bigger ones.", 0) \
    M(Bool, distributed_directory_monitor_split_batch_on_failure, false, "Should StorageDistributed DirectoryMonitors try to split batch into smaller in case of failures.", 0) \
    \
    M(Bool, optimize_move_to_prewhere, true, "Allows disabling WHERE to PREWHERE optimization in SELECT queries from MergeTree.", 0) \
    M(Bool, optimize_move_to_prewhere_if_final, false, "If query has `FINAL`, the optimization `move_to_prewhere` is not always correct and it is enabled only if both settings `optimize_move_to_prewhere` and `optimize_move_to_prewhere_if_final` are turned on", 0) \
    \
    M(UInt64, replication_alter_partitions_sync, 1, "Wait for actions to manipulate the partitions. 0 - do not wait, 1 - wait for execution only of itself, 2 - wait for everyone.", 0) \
    M(Int64, replication_wait_for_inactive_replica_timeout, 120, "Wait for inactive replica to execute ALTER/OPTIMIZE. Time in seconds, 0 - do not wait, negative - wait for unlimited time.", 0) \
    \
    M(LoadBalancing, load_balancing, LoadBalancing::RANDOM, "Which replicas (among healthy replicas) to preferably send a query to (on the first attempt) for distributed processing.", 0) \
    M(UInt64, load_balancing_first_offset, 0, "Which replica to preferably send a query when FIRST_OR_RANDOM load balancing strategy is used.", 0) \
    \
    M(TotalsMode, totals_mode, TotalsMode::AFTER_HAVING_EXCLUSIVE, "How to calculate TOTALS when HAVING is present, as well as when max_rows_to_group_by and group_by_overflow_mode = ‘any’ are present.", IMPORTANT) \
    M(Float, totals_auto_threshold, 0.5, "The threshold for totals_mode = 'auto'.", 0) \
    \
    M(Bool, allow_suspicious_low_cardinality_types, false, "In CREATE TABLE statement allows specifying LowCardinality modifier for types of small fixed size (8 or less). Enabling this may increase merge times and memory consumption.", 0) \