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Posted to dev@rocketmq.apache.org by GitBox <gi...@apache.org> on 2021/03/17 09:25:49 UTC
[GitHub] [rocketmq] renxinlin opened a new issue #2734: warmMappedFile相关疑问
renxinlin opened a new issue #2734:
URL: https://github.com/apache/rocketmq/issues/2734
AllocateMappedFileService.mmapOperation 在创建映射文件进行内存预热的时候
byteBuffer.put(i, (byte) 0);
为什么put的值是0，可不可以是1，或者其他值;
一直不太理解，求赐教
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[GitHub] [rocketmq] renxinlin commented on issue #2734: Questions about warmmappedfile
Posted by GitBox <gi...@apache.org>.
renxinlin commented on issue #2734:
URL: https://github.com/apache/rocketmq/issues/2734#issuecomment-801631563
> 我觉得可以，把内存占住就可以了
我个人的理解是不管0还是1或者其他值都会完成物理内存页的分配，只是0并没有改变原先bytebuffer的内容，同时达到分配物理内存的效果;希望有人帮助解惑
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[GitHub] [rocketmq] RongtongJin closed issue #2734: Questions about warmmappedfile
Posted by GitBox <gi...@apache.org>.
RongtongJin closed issue #2734:
URL: https://github.com/apache/rocketmq/issues/2734
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[GitHub] [rocketmq] RongtongJin commented on issue #2734: Questions about warmmappedfile
Posted by GitBox <gi...@apache.org>.
RongtongJin commented on issue #2734:
URL: https://github.com/apache/rocketmq/issues/2734#issuecomment-801116166
我觉得可以，把内存占住就可以了
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