Com configurações antigas, meu VPS (1 CPU, 1 GB de RAM, 1 GB de swap) funciona normalmente por quase 2 anos. Eu não mudei nada desde o começo.
Mas eu tenho esse problema há vários dias, o servidor MySQL automaticamente desligado, enquanto assistia via monitoramento DO Graph, percebi que parece desligar cada CPU sobrecarregada (> 100%).
Então eu tentei fazer:
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algumas otimizações do servidor MySQL em etc / my.cnf; converter para innodb, aceitar somente localhost, configurações de cache, etc
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desligue todos os sites no servidor, deixe apenas 1 site do WordPress, este site do WordPress usou o innodb por padrão
Depois de reiniciar o servidor Mariadb, parece que tudo está bem, eu testei por um tempo, ele funciona normalmente. Mas quando estou offline por volta de 1 hora, agora ele desliga novamente mas todas as cargas estão normais, parece que esse problema não envolve sobrecarga?
Por favor me ajude para isso, alguém enfrenta esse problema?
E pode me dizer o que é criptografia de processo com o comando top?
Veja o log completo de
180918 10:02:50 mysqld_safe Number of processes running now: 0
180918 10:02:50 mysqld_safe mysqld restarted
180918 10:02:50 InnoDB: The InnoDB memory heap is disabled
180918 10:02:50 InnoDB: Mutexes and rw_locks use GCC atomic builtins
180918 10:02:50 InnoDB: Compressed tables use zlib 1.2.7
180918 10:02:50 InnoDB: Using Linux native AIO
180918 10:02:50 [Note] /usr/libexec/mysqld (mysqld 5.5.56-MariaDB) starting as process 32632 ...
180918 10:02:50 InnoDB: Initializing buffer pool, size = 800.0M
InnoDB: mmap(860979200 bytes) failed; errno 12
180918 10:02:50 InnoDB: Completed initialization of buffer pool
180918 10:02:50 InnoDB: Fatal error: cannot allocate memory for the buffer pool
180918 10:02:50 [ERROR] Plugin 'InnoDB' init function returned error.
180918 10:02:50 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
180918 10:02:50 [Note] Plugin 'FEEDBACK' is disabled.
180918 10:02:50 [ERROR] Unknown/unsupported storage engine: InnoDB
180918 10:02:50 [ERROR] Aborting
180918 10:02:50 [Note] /usr/libexec/mysqld: Shutdown complete
180918 10:02:50 mysqld_safe mysqld from pid file /var/run/mariadb/mariadb.pid ended
180918 10:10:07 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
180918 10:10:07 InnoDB: The InnoDB memory heap is disabled
180918 10:10:07 InnoDB: Mutexes and rw_locks use GCC atomic builtins
180918 10:10:07 InnoDB: Compressed tables use zlib 1.2.7
180918 10:10:07 InnoDB: Using Linux native AIO
180918 10:10:07 [Note] /usr/libexec/mysqld (mysqld 5.5.56-MariaDB) starting as process 1625 ...
180918 10:10:07 InnoDB: Initializing buffer pool, size = 800.0M
180918 10:10:08 InnoDB: Completed initialization of buffer pool
180918 10:10:08 InnoDB: highest supported file format is Barracuda.
180918 10:10:08 InnoDB: Starting crash recovery from checkpoint LSN=698432796
InnoDB: Restoring possible half-written data pages from the doublewrite buffer...
180918 10:10:08 InnoDB: Starting final batch to recover 2 pages from redo log
180918 10:10:09 InnoDB: Waiting for the background threads to start
180918 10:10:10 Percona XtraDB (http://www.percona.com) 5.5.52-MariaDB-38.3 started; log sequence nu$
180918 10:10:10 [Note] Plugin 'FEEDBACK' is disabled.
180918 10:10:10 [Note] Server socket created on IP: '127.0.0.1'.
180918 10:10:10 [Warning] 'proxies_priv' entry '@ [email protected]' ignored in --skip-name$
180918 10:10:10 [Note] Event Scheduler: Loaded 0 events
180918 10:10:10 [Note] /usr/libexec/mysqld: ready for connections.
Version: '5.5.56-MariaDB' socket: '/var/lib/mysql/mysql.sock' port: 3306 MariaDB Server
180918 11:19:10 mysqld_safe Number of processes running now: 0
180918 11:19:10 mysqld_safe mysqld restarted
180918 11:19:10 InnoDB: The InnoDB memory heap is disabled
180918 11:19:10 InnoDB: Mutexes and rw_locks use GCC atomic builtins
180918 11:19:10 InnoDB: Compressed tables use zlib 1.2.7
180918 11:19:10 InnoDB: Using Linux native AIO
180918 11:19:10 [Note] /usr/libexec/mysqld (mysqld 5.5.56-MariaDB) starting as process 3017 ...
180918 11:19:10 InnoDB: Initializing buffer pool, size = 800.0M
InnoDB: mmap(860979200 bytes) failed; errno 12
180918 11:19:10 InnoDB: Completed initialization of buffer pool
E aqui estão as otimizações que eu fiz em /etc/my.cnf
[mysqld]
# custom
bind-address = 127.0.0.1
skip-name-resolve
skip-external-locking
key_buffer_size = 32K
max_allowed_packet = 4M
table_open_cache = 8
sort_buffer_size = 128K
read_buffer_size = 512K
read_rnd_buffer_size = 512K
net_buffer_length = 4K
thread_stack = 480K
thread_cache_size = 8
innodb_file_per_table=1
max_connections = 100
max_user_connections=50
wait_timeout=50
interactive_timeout=50
long_query_time=5
query_cache_type = 1
query_cache_limit=1M
query_cache_min_res_unit = 2k
query_cache_size=32M ## 32MB for every 1GB of RAM
tmp_table_size= 64M
max_heap_table_size= 64M
log_error = /var/log/mariadb/error.log
expire_logs_days = 5
max_binlog_size = 100M
innodb_buffer_pool_size=800M
innodb_buffer_pool_instances = 3
E aqui está o comando principal