2018-04-11 4:21:22 139776003043904 [Note] InnoDB: innodb_empty_free_list_algorithm has been changed to legacy because of small buffer pool size. In order to use backoff, increase buffer pool at least up to 20MB.
2018-04-11 4:21:22 139776003043904 [Note] InnoDB: Using mutexes to ref count buffer pool pages
2018-04-11 4:21:22 139776003043904 [Note] InnoDB: The InnoDB memory heap is disabled
2018-04-11 4:21:22 139776003043904 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2018-04-11 4:21:22 139776003043904 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2018-04-11 4:21:22 139776003043904 [Note] InnoDB: Compressed tables use zlib 1.2.8
2018-04-11 4:21:22 139776003043904 [Note] InnoDB: Using Linux native AIO
2018-04-11 4:21:22 139776003043904 [Note] InnoDB: Using SSE crc32 instructions
2018-04-11 4:21:22 139776003043904 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2018-04-11 4:21:22 139776003043904 [Note] InnoDB: Completed initialization of buffer pool
2018-04-11 4:21:22 139776003043904 [ERROR] InnoDB: ./ibdata1 can't be opened in read-write mode
2018-04-11 4:21:22 139776003043904 [ERROR] InnoDB: The system tablespace must be writable!
2018-04-11 4:21:22 139776003043904 [ERROR] Plugin 'InnoDB' init function returned error.
2018-04-11 4:21:22 139776003043904 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2018-04-11 4:21:22 139776003043904 [Note] Plugin 'FEEDBACK' is disabled.
2018-04-11 4:21:22 139776003043904 [ERROR] Unknown/unsupported storage engine: InnoDB
2018-04-11 4:21:22 139776003043904 [ERROR] Aborting

[mysqld]
# default-character-set = utf8
collation-server = utf8_unicode_ci
init-connect='SET NAMES utf8'
character-set-server = utf8

# paths
datadir = /storage/mysql
tmpdir = /tmp/mysql

# network
connect_timeout = 60
wait_timeout = 14400
max_connections = 2048
max_allowed_packet = 32M
max_connect_errors = 1000

# limits
tmp_table_size = 256M
max_heap_table_size = 128M
table_cache = 256

# logs
log_error = /storage/mysql/log-error.log
slow_query_log_file = /storage/mysql/log-slow.log
slow_query_log = 1
long_query_time = 20

# innodb
innodb_file_per_table = 1

innodb_data_home_dir = /storage/mysql
innodb_data_file_path = ibdata1:128M;ibdata2:128M:autoextend
innodb_file_per_table = 1
innodb_status_file = 1
innodb_additional_mem_pool_size = 128M
innodb_buffer_pool_size = 2G
innodb_flush_method = O_DIRECT
innodb_io_capacity = 1000
innodb_flush_log_at_trx_commit = 2
innodb_support_xa = 0
innodb_log_file_size = 256M
innodb_log_buffer_size = 64M

# experimental
innodb_stats_update_need_lock = 0

# other stuff
event_scheduler = 1
query_cache_type = 0