5.5.51 i5 nuc

gistfile1.txt

[mysqld]
sql_mode=no_engine_substitution,no_unsigned_subtraction
tmpdir=/data/m/my
query_cache_size=0
query_cache_type=0
long_query_time=5
log_bin=/data/m/my/binlogs/bl
max_binlog_size=128M
sync_binlog=0
server_id=77
binlog_format=ROW
datadir=/data/m/my/data

innodb_max_dirty_pages_pct=75
innodb_adaptive_flushing=1
innodb_file_format=Barracuda
innodb_file_per_table=1
innodb_flush_log_at_trx_commit=2
innodb_flush_method=O_DIRECT
innodb_doublewrite=1
innodb_buffer_pool_size=12G

innodb_io_capacity=10000
loose_innodb_buffer_pool_instances=1

innodb_data_home_dir=/data/m/my/data
innodb_data_file_path=ibdata1:512M:autoextend
innodb_log_group_home_dir=/data/m/my/txlogs

performance_schema=1

[mysqld_safe]
malloc-lib=/usr/lib/x86_64-linux-gnu/libjemalloc.so