How to use MySQLTuner on Amazon RDS
https://dba.stackexchange.com/questions/112937
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29-09-2020 - |
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I've installed MySQLTuner locally and it works on my local database.
When I try to run it on my Amazon RDS db it does not, it says my login credentials are invalid.
$ perl mysqltuner.pl --host testing-db.??????????.us-east-1.rds.amazonaws.com --port 3306 --user admin_un --password admin_pw --forcemem 7500
[--] Performing tests on testing-db.??????????.us-east-1.rds.amazonaws.com:3306
[!!] Attempted to use login credentials, but they were invalid
I'm able to myssql normally into the RDS db locally with.
mysql -h testing-db.??????????.us-east-1.rds.amazonaws.com -P 3306 -u admin_un -p
What could I be missing here?
UPDATE
The DB is on an AWS RDS db.m3.large instance which has 2 vCPUs and 7.5GiB of RAM. I've configured the MySQL configuration settings as suggested here in an RDS Parameter Group from the AWS console.
SHOW VARIABLES;
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auto_increment_offset 1
autocommit ON
automatic_sp_privileges ON
back_log 170
basedir /rdsdbbin/mysql/
big_tables OFF
bind_address *
binlog_cache_size 32768
binlog_checksum CRC32
binlog_direct_non_transactional_updates OFF
binlog_error_action IGNORE_ERROR
binlog_format MIXED
binlog_gtid_simple_recovery OFF
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binlog_order_commits ON
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character_set_filesystem binary
character_set_results utf8
character_set_server latin1
character_set_system utf8
character_sets_dir /rdsdbbin/mysql-5.6.23.R1/share/charsets/
collation_connection utf8_general_ci
collation_database latin1_swedish_ci
collation_server latin1_swedish_ci
completion_type NO_CHAIN
concurrent_insert AUTO
connect_timeout 10
core_file OFF
datadir /rdsdbdata/db/
date_format %Y-%m-%d
datetime_format %Y-%m-%d %H:%i:%s
default_storage_engine InnoDB
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ft_max_word_len 84
ft_min_word_len 4
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general_log OFF
general_log_file /rdsdbdata/log/general/mysql-general.log
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innodb_data_home_dir /rdsdbdata/db/innodb
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innodb_doublewrite ON
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innodb_file_format Antelope
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lc_time_names en_US
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pid_file /rdsdbdata/log/mysql-3306.pid
plugin_dir /rdsdbbin/mysql-5.6.23.R1/lib/plugin/
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Select_range_check 0
Select_scan 50953
Slave_heartbeat_period 0.000
Slave_last_heartbeat
Slave_open_temp_tables 0
Slave_received_heartbeats 0
Slave_retried_transactions 0
Slave_running OFF
Slow_launch_threads 0
Slow_queries 0
Sort_merge_passes 0
Sort_range 70961
Sort_rows 1330326
Sort_scan 114741
Ssl_accept_renegotiates 0
Ssl_accepts 0
Ssl_callback_cache_hits 0
Ssl_cipher
Ssl_cipher_list
Ssl_client_connects 0
Ssl_connect_renegotiates 0
Ssl_ctx_verify_depth 0
Ssl_ctx_verify_mode 0
Ssl_default_timeout 0
Ssl_finished_accepts 0
Ssl_finished_connects 0
Ssl_server_not_after
Ssl_server_not_before
Ssl_session_cache_hits 0
Ssl_session_cache_misses 0
Ssl_session_cache_mode Unknown
Ssl_session_cache_overflows 0
Ssl_session_cache_size 0
Ssl_session_cache_timeouts 0
Ssl_sessions_reused 0
Ssl_used_session_cache_entries 0
Ssl_verify_depth 0
Ssl_verify_mode 0
Ssl_version
Table_locks_immediate 1565535
Table_locks_waited 0
Table_open_cache_hits 1564338
Table_open_cache_misses 1346
Table_open_cache_overflows 19
Tc_log_max_pages_used 0
Tc_log_page_size 0
Tc_log_page_waits 0
Threads_cached 4
Threads_connected 5
Threads_created 9
Threads_running 1
Uptime 7754
Uptime_since_flush_status 7754
Решение
Observations
Version: 5.6.23-log
7.5 GB of RAM
Uptime = 02:09:14; Please rerun SHOW GLOBAL STATUS after several hours.
You are not running on Windows.
Running 64-bit version
You appear to be running entirely (or mostly) InnoDB.
Important items
tmp_table_size = 64M
Review indexes and query formulation -- many are looking inefficient (by using tmp tables, etc)
To help in identifying the naughty queries, recommend setting long_query_time=2 and turning on the slowlog.
Replication is turned on, but the binlogs are being kept forever? Or does RDS purge them in some way I don't know about.
Details
( Innodb_buffer_pool_pages_free * 16384 / innodb_buffer_pool_size ) = 346,833 * 16384 / 5705302016 = 99.6% -- % of buffer pool free -- buffer_pool_size is bigger than working set; could decrease it (not critical)
( Uptime / 60 * innodb_log_file_size / Innodb_os_log_written ) = 7,754 / 60 * 128M / 7059968 = 2,456 -- Minutes between InnoDB log rotations Beginning with 5.6.8, this can be changed dynamically; be sure to also change my.cnf. -- (The recommendation of 60 minutes between rotations is somewhat arbitrary.) Adjust innodb_log_file_size. -- Very low activity on your server
( tmp_table_size ) = 265M -- Limit on size of MEMORY temp tables used to support a SELECT ( max_heap_table_size / _ram ) = 256M / 7680M = 3.3% -- Percent of RAM to allocate when needing MEMORY table for a temp table inside a SELECT (per temp table per some SELECTs). Too high may lead to swapping. (max_heap_table_size also user limits MEMORY tables.) -- Decrease both to, say, 1% of ram.
( local_infile ) = ON -- local_infile = ON is a potential security issue
( Created_tmp_disk_tables ) = 45,149 / 7754 = 5.8 /sec -- Frequency of creating disk "temp" tables as part of complex SELECTs ( Created_tmp_disk_tables / (Created_tmp_disk_tables + Created_tmp_tables) ) = 45,149 / (45149 + 113444) = 28.5% -- Percent of temp tables that spilled to disk -- Check the rules for temp tables being able to use MEMORY instead of MyISAM. It may be possible to make a minor schema or query change to avoid MyISAM. Better indexes and reformulation of queries can also help.
-- Decrease tmp_table_size to avoid running out of RAM. Perhaps no more than 64M.
( Select_scan ) = 50,953 / 7754 = 6.6 /sec -- full table scans ( Select_scan / Com_select ) = 50,953 / 700098 = 7.3% -- % of selects doing full table scan. (May be fooled by Stored Routines.) -- Add indexes / optimize queries (unless they are tiny tables)
( binlog_format ) = MIXED -- STATEMENT/ROW/MIXED. ROW is preferred; it may become the default.
( expire_logs_days ) = 0 -- How soon to automatically purge binlog (after this many days) -- Too large (or zero) = consumes disk space; too small = need to respond quickly to network/machine crash.
( slow_query_log ) = OFF -- Whether to log slow queries. (5.1.12) ( long_query_time ) = 10.000000 = 10 -- Cutoff (Seconds) for defining a "slow" query. -- Suggest ON and 2
( Com_flush ) = 12/HR ( Com_purge ) = 12/HR -- What is doing so many FLUSHes and PURGEs? These are both rarely-used commands.
You have the Query Cache half-off. You should set both query_cache_type = OFF and query_cache_size = 0 . There is (according to a rumor) a 'bug' in the QC code that leaves some code on unless you turn off both of those settings.
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