From 82634b817e0a02e0a0cfd2debc69e9b0dadd077d Mon Sep 17 00:00:00 2001 From: dinglei Date: Thu, 21 Feb 2019 10:57:18 +0800 Subject: [PATCH] Change the first character to upper case. --- docs/en/Troubleshoopting.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/docs/en/Troubleshoopting.md b/docs/en/Troubleshoopting.md index 1b3838e5..4ea3d64f 100644 --- a/docs/en/Troubleshoopting.md +++ b/docs/en/Troubleshoopting.md @@ -20,7 +20,7 @@ Solution: Execute `export NAMESRV_ADDR=ip:9876` (ip refers to the address of Na Solution: The jar package of RocketMQ, such as rocketmq-client, should be the same version on the consumer and producer. -## 3. when adding a new topic consumer group, historical messages can‘t be consumed. +## 3. When adding a new topic consumer group, historical messages can‘t be consumed. > Problem: When a new consumer group of the same topic is started, the consumed message is the current offset message, and the historical message is not obtained. @@ -54,7 +54,7 @@ consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_TIMESTAMP); In some cases, the Consumer needs to reset the consume position to 1-2 days ago. At this time, on the Master Broker with limited memory, the CommitLog will carry a relatively heavy IO pressure, affecting the reading and writing of other messages on that Broker. You can enable `slaveReadEnable=true`. When Master Broker finds that the difference between the Consumer's consume position and the latest value of CommitLog exceeds the percentage of machine's memory (`accessMessageInMemoryMaxRatio=40%`), it will recommend Consumer to read from Slave Broker and relieve Master Broker's IO. -## 5. performance +## 5. Performance Asynchronous flush disk is recommended to use spin lock. @@ -73,4 +73,4 @@ SendResult [sendStatus=SEND_OK, msgId=0A42333A0DC818B4AAC246C290FD0000, offsetMs ``` - msgId，for the client, the msgId is generated by the producer instance. Specifically, the method `MessageClientIDSetter.createUniqIDBuffer()` is called to generate a unique Id. -- offsetMsgId, offsetMsgId is generated by the Broker server when writing a message ( string concating "IP address + port" and "CommitLog's physical offset address"), and offsetMsgId is the messageId used to query in the RocketMQ console. \ No newline at end of file +- offsetMsgId, offsetMsgId is generated by the Broker server when writing a message ( string concating "IP address + port" and "CommitLog's physical offset address"), and offsetMsgId is the messageId used to query in the RocketMQ console. -- GitLab