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fuiou_cary 发表于 2014-12-2 11:40 ![]()
没有,效率高的时候基本没问题,但是一旦碰到多个慢查询一起查这个表,恰好这个时候插入数据服务器响应慢 ...
The number of unprocessed epochs by which a subscribing node can lag behind. Exceeding this number causes a lagging subscriber to be disconnected.
The default value of 100 is sufficient for most normal operations. If a subscribing node does lag enough to cause disconnections, it is usually due to network or scheduling issues with regard to processes or threads. (In rare circumstances, the problem may be due to a bug in the NDB client.) It may be desirable to set the value lower than the default when epochs are longer.
Disconnection prevents client issues from affecting the data node service, running out of memory to buffer data, and eventually shutting down. Instead, only the client is affected as a result of the disconnect (by, for example gap events in the binary log), forcing the client to reconnect or restart the process.
5.1文档里的 请问有没有尝试减小值? |
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