【发布时间】：2020-07-03 14:58:45
【问题描述】：
我想将 MySQL 从 5.7.24 升级到 8.0.20，所以我按照here 的步骤操作。
TL;DR，我在C:/Wamp/bin/mysql中下载并解压了MySQL 8 zip文件，并复制了旧的data文件夹， my.ini 和 wampserver.conf 到新的 mysql8.0.20 文件夹中。
我还在 my.ini 中将“5.7.24”的所有实例更改为“8.0.20”，并运行命令mysqld.exe --initialize-insecure。
这是我没有 cmets 的 my.ini 文件：
[client]
port = 3306
socket = /tmp/mysql.sock
[wampmysqld64]
default_authentication_plugin=mysql_native_password
port = 3306
socket = /tmp/mysql.sock
key_buffer_size = 256M
max_allowed_packet = 1M
table_definition_cache = 600
sort_buffer_size = 2M
net_buffer_length = 8K
read_buffer_size = 2M
read_rnd_buffer_size = 2M
myisam_sort_buffer_size = 64M
basedir="C:/Wamp/bin/mysql/mysql8.0.20"
log-error="C:/Wamp/logs/mysql.log"
log_error_verbosity=2
datadir="C:/Wamp/bin/mysql/mysql8.0.20/data"
lc-messages-dir="C:/Wamp/bin/mysql/mysql8.0.20/share"
lc-messages=en_US
default-storage-engine=MYISAM
secure_file_priv="C:/Wamp/tmp"
skip-ssl
explicit_defaults_for_timestamp=true
sql-mode="STRICT_ALL_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_ZERO_DATE,NO_ZERO_IN_DATE,NO_AUTO_CREATE_USER"
skip-federated
server-id = 1
skip-slave-start
early-plugin-load=""
innodb_data_file_path = ibdata1:12M:autoextend
innodb_buffer_pool_size = 256M
innodb_log_file_size = 256M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50
innodb_flush_method=normal
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
[isamchk]
key_buffer_size = 20M
sort_buffer_size = 20M
read_buffer_size = 2M
write_buffer_size = 2M
[myisamchk]
key_buffer_size = 20M
sort_buffer_size_size = 20M
read_buffer_size = 2M
write_buffer_size = 2M
[mysqlhotcopy]
interactive-timeout
[mysqld]
default_authentication_plugin=mysql_native_password
port = 3306
但是当我运行 Wamp 时，图标保持橙色，并且显示 3 个服务中只有 2 个正在运行。如果我检查服务状态，它会说：
The service 'wampmysqld64' is NOT started
EXIT error code:0
Help message for error code 0 is: The operation completed successfully.
这意味着一切正常。它确实如此。我可以使用 MySQL 并毫无问题地打开控制台。那为什么图标还是橙色的呢？
如果我进入 services.msc 并查找 wampmysqld64，该服务没有运行，我无法启动它：
The wampmysqld64 service on Local Computer started and then stopped.
Some services stop automatically if they are not in use by other services or programs.
我还从 mysql8.0.20/data 文件夹中删除了文件 ib_logfile0、ib_logfile1 和 ibdata1 .
如果我回到旧的 MySQL 版本，错误仍然存在。
【问题讨论】：
标签： mysql wamp wampserver