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当数据库有大量的删除时，canal解析变慢 #355

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jayws opened this issue Aug 3, 2017 · 2 comments
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当数据库有大量的删除时，canal解析变慢 #355

jayws opened this issue Aug 3, 2017 · 2 comments

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@jayws
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jayws commented Aug 3, 2017

当数据库有大量的删除时，canal解析变慢，之前每个小时可以解析5万，有大量删除后每个小时才100条，请问有什么可以解决方法吗？谢谢
@lan1994
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lan1994 commented Aug 4, 2017

这个和#267 是同一类问题

@wufengbin
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mysql配置如下参数：innodb_flush_log_at_trx_commit
在提交事务的时候是否提交缓冲?
有3个值：
0：不会主动触发日志缓冲写入磁盘
1（默认）：每次提交事务的时候，同时会把日志缓冲刷新到磁盘
2：每次提交事务的时候，会把日志缓冲刷新到磁盘，但是他不是同时进行的
而是每秒钟刷新一次
建议配置成2 ，对性能影响较大。
可以试试这个

@agapple agapple mentioned this issue Jun 30, 2018
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@agapple agapple closed this as completed Jul 31, 2018
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4 participants
@agapple @lan1994 @wufengbin @jayws