Δημιουργία tmp φακέλου μέσα στο φάκελο /var/lib/mysql/ σε περίπτωση που είναι μόνο αυτός ορισμένος σε ssd δίσκο.
Ορισμός δικαιωμάτων:
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chown mysql:mysql /var/lib/mysql/tmp
chmod 750 /var/lib/mysql/tmp
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Δημιουργία mysql-slow.log αρχείου μέσα στο φάκελο /var/log/ για καταγραφή αργών ερωτημάτων.
Ορισμός δικαιωμάτων:
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chown mysql:mysql /var/log/mysql–slow.log
chmod 640 /var/log/mysql–slow.log
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Βελτιστοποιημένο my.cnf:
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[mysqld]
# ======================
# BASIC
# ======================
tmpdir = /var/lib/mysql/tmp
max_allowed_packet = 64M
local_infile = 0
skip_name_resolve = 1
skip_host_cache
max_connect_errors = 1000000
# ======================
# INNODB
# ======================
innodb_buffer_pool_size = 36G
innodb_log_file_size = 1G
innodb_log_buffer_size = 64M
innodb_flush_method = O_DIRECT
innodb_flush_log_at_trx_commit = 1
innodb_io_capacity = 2000
innodb_io_capacity_max = 4000
innodb_flush_neighbors = 0
innodb_read_io_threads = 4
innodb_write_io_threads = 4
innodb_purge_threads = 4
innodb_file_per_table = 1
innodb_lock_wait_timeout = 50
innodb_max_dirty_pages_pct = 75
innodb_max_dirty_pages_pct_lwm = 10
# ======================
# CONNECTIONS
# ======================
# Slightly more conservative without DB Governor.
max_connections = 150
thread_cache_size = 128
back_log = 256
wait_timeout = 300
interactive_timeout = 600
# ======================
# TEMP TABLES
# ======================
tmp_table_size = 64M
max_heap_table_size = 64M
# ======================
# PER-CONNECTION BUFFERS
# ======================
sort_buffer_size = 2M
join_buffer_size = 2M
read_buffer_size = 1M
read_rnd_buffer_size = 1M
# ======================
# MYISAM
# ======================
key_buffer_size = 1G
concurrent_insert = 2
myisam_recover_options = BACKUP,FORCE
# ======================
# TABLE CACHE
# ======================
table_open_cache = 8000
table_definition_cache = 8000
table_open_cache_instances = 16
open_files_limit = 80000
# ======================
# QUERY CACHE
# ======================
query_cache_type = 0
query_cache_size = 0
# ======================
# LOGGING
# ======================
slow_query_log = 1
slow_query_log_file = /var/log/mysql–slow.log
long_query_time = 3
min_examined_row_limit = 100
log_queries_not_using_indexes = 0
# ======================
# DURABILITY
# ======================
sync_binlog = 1
# ======================
# MONITORING
# ======================
performance_schema = ON
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Μετά κάνουμε επανεκκίνηση της mysql.
