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Amazon Relational Database Service
User Guide (API Version 2014-10-31)

DB Cluster and DB Instance Parameters

You manage your Amazon Aurora DB cluster in the same way that you manage other Amazon RDS DB instances, by using parameters in a DB parameter group. Amazon Aurora differs from other DB engines in that you have a cluster of DB instances. As a result, some of the parameters that you use to manage your Amazon Aurora DB cluster apply to the entire cluster, while other parameters apply only to a particular DB instance in the DB cluster.

Cluster-level parameters are managed in DB cluster parameter groups. Instance-level parameters are managed in DB parameter groups. Although each DB instance in an Aurora DB cluster is compatible with the MySQL database engine, some of the MySQL database engine parameters must be applied at the cluster level, and are managed using DB cluster parameter groups. Cluster-level parameters are not found in the DB parameter group for an instance in an Aurora DB cluster and are listed later in this topic.

You can manage both cluster-level and instance-level parameters using the Amazon RDS console, the AWS CLI, or the Amazon RDS API. There are separate commands for managing cluster-level parameters and instance-level parameters. For example, you can use the modify-db-cluster-parameter-group AWS CLI command to manage cluster-level parameters in a DB cluster parameter group and use the modify-db-parameter-group AWS CLI command to manage instance-level parameters in a DB parameter group for a DB instance in a DB cluster.

You can view both cluster-level and instance-level parameters in the RDS console, or by using the AWS CLI or Amazon RDS API. For example, you can use the describe-db-cluster-parameters AWS CLI command to view cluster-level parameters in a DB cluster parameter group and use the describe-db-parameters AWS CLI command to view instance-level parameters in a DB parameter group for a DB instance in a DB cluster.

For more information on DB parameter groups, see Working with DB Parameter Groups.

Note

Some MySQL database engine parameters that are available to RDS MySQL DB instances are not available to instances in an Aurora DB cluster. For details on the differences between an Aurora instance and a MySQL DB instance, see Comparison of Amazon Aurora and Amazon RDS for MySQL.

Cluster-level Parameters

The following table shows all of the parameters that apply to the entire Aurora DB cluster.

Parameter name Modifiable

aurora_load_from_s3_role

Yes

aurora_select_into_s3_role

Yes

auto_increment_increment

Yes

auto_increment_offset

Yes

aws_default_lambda_role

Yes

aws_default_s3_role

Yes

binlog_checksum

Yes

binlog_format

Yes

binlog_row_image

No

binlog_rows_query_log_events

No

character-set-client-handshake

Yes

character_set_client

Yes

character_set_connection

Yes

character_set_database

Yes

character_set_filesystem

Yes

character_set_results

Yes

collation_connection

Yes

collation_server

Yes

completion_type

Yes

default_storage_engine

No

innodb_autoinc_lock_mode

Yes

innodb_checksum_algorithm

No

innodb_checksums

No

innodb_cmp_per_index_enabled

Yes

innodb_commit_concurrency

Yes

innodb_data_home_dir

No

innodb_doublewrite

No

innodb_file_per_table

Yes

innodb_flush_log_at_trx_commit

Yes

innodb_ft_max_token_size

Yes

innodb_ft_min_token_size

Yes

innodb_ft_num_word_optimize

Yes

innodb_ft_sort_pll_degree

Yes

innodb_online_alter_log_max_size

Yes

innodb_optimize_fulltext_only

Yes

innodb_page_size

No

innodb_purge_batch_size

Yes

innodb_purge_threads

Yes

innodb_rollback_on_timeout

Yes

innodb_rollback_segments

Yes

innodb_spin_wait_delay

Yes

innodb_strict_mode

Yes

innodb_support_xa

Yes

innodb_sync_array_size

Yes

innodb_sync_spin_loops

Yes

innodb_table_locks

Yes

innodb_undo_directory

No

innodb_undo_logs

Yes

innodb_undo_tablespaces

No

lc_time_names

Yes

lower_case_table_names

Yes

master-info-repository

Yes

master_verify_checksum

Yes

server_audit_events

Yes

server_audit_excl_users

Yes

server_audit_incl_users

Yes

server_audit_logging

Yes

server_id

No

skip-character-set-client-handshake

Yes

skip_name_resolve

No

sync_frm

Yes

time_zone

Yes

Instance-level Parameters

The following table shows all of the parameters that apply to a specific DB instance in an Aurora DB cluster.

Parameter name Modifiable

allow-suspicious-udfs

No

aurora_lab_mode

Yes

autocommit

Yes

automatic_sp_privileges

Yes

back_log

Yes

basedir

No

binlog_cache_size

Yes

binlog_max_flush_queue_time

Yes

binlog_order_commits

Yes

binlog_stmt_cache_size

Yes

bulk_insert_buffer_size

Yes

concurrent_insert

Yes

connect_timeout

Yes

core-file

No

datadir

No

default_time_zone

No

default_tmp_storage_engine

Yes

default_week_format

Yes

delay_key_write

Yes

delayed_insert_limit

Yes

delayed_insert_timeout

Yes

delayed_queue_size

Yes

div_precision_increment

Yes

end_markers_in_json

Yes

enforce_gtid_consistency

No

eq_range_index_dive_limit

Yes

event_scheduler

Yes

explicit_defaults_for_timestamp

Yes

flush

No

flush_time

Yes

ft_boolean_syntax

No

ft_max_word_len

Yes

ft_min_word_len

Yes

ft_query_expansion_limit

Yes

ft_stopword_file

Yes

general_log

Yes

general_log_file

No

group_concat_max_len

Yes

gtid-mode

No

host_cache_size

Yes

init_connect

Yes

innodb_adaptive_flushing

Yes

innodb_adaptive_hash_index

Yes

innodb_adaptive_max_sleep_delay

Yes

innodb_autoextend_increment

Yes

innodb_buffer_pool_dump_at_shutdown

No

innodb_buffer_pool_dump_now

No

innodb_buffer_pool_filename

No

innodb_buffer_pool_load_abort

No

innodb_buffer_pool_load_at_startup

No

innodb_buffer_pool_load_now

No

innodb_buffer_pool_size

Yes

innodb_change_buffer_max_size

No

innodb_compression_failure_threshold_pct

Yes

innodb_compression_level

Yes

innodb_compression_pad_pct_max

Yes

innodb_concurrency_tickets

Yes

innodb_file_format

Yes

innodb_flush_log_at_timeout

No

innodb_flush_method

Yes

innodb_flush_neighbors

No

innodb_flushing_avg_loops

No

innodb_force_load_corrupted

No

innodb_ft_aux_table

Yes

innodb_ft_cache_size

Yes

innodb_ft_enable_stopword

Yes

innodb_ft_server_stopword_table

Yes

innodb_ft_user_stopword_table

Yes

innodb_io_capacity

No

innodb_io_capacity_max

No

innodb_large_prefix

Yes

innodb_lock_wait_timeout

Yes

innodb_log_compressed_pages

No

innodb_lru_scan_depth

Yes

innodb_max_dirty_pages_pct

Yes

innodb_max_purge_lag

Yes

innodb_max_purge_lag_delay

Yes

innodb_monitor_disable

Yes

innodb_monitor_enable

Yes

innodb_monitor_reset

Yes

innodb_monitor_reset_all

Yes

innodb_old_blocks_pct

Yes

innodb_old_blocks_time

Yes

innodb_open_files

Yes

innodb_print_all_deadlocks

Yes

innodb_random_read_ahead

Yes

innodb_read_ahead_threshold

Yes

innodb_read_io_threads

No

innodb_read_only

No

innodb_replication_delay

Yes

innodb_sort_buffer_size

Yes

innodb_stats_auto_recalc

Yes

innodb_stats_method

Yes

innodb_stats_on_metadata

Yes

innodb_stats_persistent

Yes

innodb_stats_persistent_sample_pages

Yes

innodb_stats_transient_sample_pages

Yes

innodb_thread_concurrency

No

innodb_thread_sleep_delay

Yes

innodb_use_native_aio

No

innodb_write_io_threads

No

interactive_timeout

Yes

join_buffer_size

Yes

keep_files_on_create

Yes

key_buffer_size

Yes

key_cache_age_threshold

Yes

key_cache_block_size

Yes

key_cache_division_limit

Yes

local_infile

Yes

lock_wait_timeout

Yes

log-bin

No

log_bin_trust_function_creators

Yes

log_bin_use_v1_row_events

Yes

log_error

No

log_output

Yes

log_queries_not_using_indexes

Yes

log_slave_updates

No

log_throttle_queries_not_using_indexes

Yes

log_warnings

Yes

long_query_time

Yes

low_priority_updates

Yes

max_allowed_packet

Yes

max_binlog_cache_size

Yes

max_binlog_size

No

max_binlog_stmt_cache_size

Yes

max_connect_errors

Yes

max_connections

Yes

max_delayed_threads

Yes

max_error_count

Yes

max_heap_table_size

Yes

max_insert_delayed_threads

Yes

max_join_size

Yes

max_length_for_sort_data

Yes

max_prepared_stmt_count

Yes

max_seeks_for_key

Yes

max_sort_length

Yes

max_sp_recursion_depth

Yes

max_tmp_tables

Yes

max_user_connections

Yes

max_write_lock_count

Yes

metadata_locks_cache_size

Yes

min_examined_row_limit

Yes

myisam_data_pointer_size

Yes

myisam_max_sort_file_size

Yes

myisam_mmap_size

Yes

myisam_sort_buffer_size

Yes

myisam_stats_method

Yes

myisam_use_mmap

Yes

net_buffer_length

Yes

net_read_timeout

Yes

net_retry_count

Yes

net_write_timeout

Yes

old-style-user-limits

Yes

old_passwords

Yes

optimizer_prune_level

Yes

optimizer_search_depth

Yes

optimizer_switch

Yes

optimizer_trace

Yes

optimizer_trace_features

Yes

optimizer_trace_limit

Yes

optimizer_trace_max_mem_size

Yes

optimizer_trace_offset

Yes

performance_schema

Yes

pid_file

No

plugin_dir

No

port

No

preload_buffer_size

Yes

profiling_history_size

Yes

query_alloc_block_size

Yes

query_cache_limit

Yes

query_cache_min_res_unit

Yes

query_cache_size

Yes

query_cache_type

Yes

query_cache_wlock_invalidate

Yes

query_prealloc_size

Yes

range_alloc_block_size

Yes

read_buffer_size

Yes

read_only

No

read_rnd_buffer_size

Yes

relay-log

No

relay_log_info_repository

Yes

relay_log_recovery

No

safe-user-create

Yes

secure_auth

Yes

secure_file_priv

No

skip-slave-start

No

skip_external_locking

No

skip_show_database

Yes

slave_checkpoint_group

Yes

slave_checkpoint_period

Yes

slave_parallel_workers

Yes

slave_pending_jobs_size_max

Yes

slave_sql_verify_checksum

Yes

slow_launch_time

Yes

slow_query_log

Yes

slow_query_log_file

No

socket

No

sort_buffer_size

Yes

sql_mode

Yes

sql_select_limit

Yes

stored_program_cache

Yes

sync_binlog

No

sync_master_info

Yes

sync_relay_log

Yes

sync_relay_log_info

Yes

sysdate-is-now

Yes

table_cache_element_entry_ttl

No

table_definition_cache

Yes

table_open_cache

Yes

table_open_cache_instances

Yes

temp-pool

Yes

thread_cache_size

Yes

thread_handling

No

thread_stack

Yes

timed_mutexes

Yes

tmp_table_size

Yes

tmpdir

No

transaction_alloc_block_size

Yes

transaction_prealloc_size

Yes

tx_isolation

Yes

updatable_views_with_limit

Yes

validate-password

No

validate_password_dictionary_file

No

validate_password_length

No

validate_password_mixed_case_count

No

validate_password_number_count

No

validate_password_policy

No

validate_password_special_char_count

No

wait_timeout

Yes