[{"data":1,"prerenderedAt":231},["ShallowReactive",2],{"article-关于阿里云ESC上go语言项目编译6l: running gcc failed: Cannot allocate memory":3},{"title":4,"article":5,"hot_article":17,"month_arch":80,"cover":228},"关于阿里云ESC上go语言项目编译6l: running gcc failed: Cannot allocate memory - 独孤影的博客",{"id":6,"title":7,"uri":7,"author":8,"tags":9,"created_at":14,"view_count":15,"content":16},32,"关于阿里云ESC上go语言项目编译6l: running gcc failed: Cannot allocate memory","duguying",[10,11,12,13],"golang","编译","内存不够","swap","2015-10-28 14:06:02",4449,"\u003Cp>前段时间将自己的阿里云服务器上的系统由centos 6.5换为了ubuntu 14，其他的硬件配置都没有发生改变，将服务器上的数据恢复并且重新安装了golang的编译环境后，发现使用go build编译稍微大一点的golang项目就会报错：\u003C\u002Fp>\u003Cblockquote>\u003Cp>\u002Fusr\u002Flocal\u002Fgo\u002Fpkg\u002Ftool\u002Flinux_amd64\u002F6l: running gcc failed: Cannot allocate memory\u003C\u002Fp>\u003C\u002Fblockquote>\u003Cp>一直想不通为啥换了个系统就会报这个错，字面意思是gcc分配内存失败，应该是内存不够用，机器配置是1G内存，free -m 发现尚有400M的内存未使用，难道剩余400M的内存还不够go build命令编译代码使用？好吧，既然如此我就给它释放内存，kill掉众多的进程之后再进行go build编译，发现又可以编译了。之后发现偶尔能编译偶尔又不能编译，看样子确实是内存不够，可是为啥之前的centos系统上没有出现这种状况呢，一直不相信简单的“内存不够”就可以解释这一问题，因为之前的centos系统上是正常的，我甚至觉得可能是gcc版本的问题，猜测只有较高版本的gcc才会报这个错误。后来也曾在“golang天朝”论坛上发过帖子，并表达自己的猜测，认为不是内存不够这么简单，结果被别人鄙视不看英文……\u003C\u002Fp>\u003Cp>不想花钱升级机器硬件，难道我只有装回centos？今天执行free -m偶然间注意到了swap的数值貌似一直是空的，我思考若是我添加swap交换空间是否能解决这一问题呢，毕竟swap其实就是用硬盘空间虚拟出的内存，一个内存的缓冲区。于是就给它加了个1G的文件作为swap，居然直接就可以用go build，再也不用担心gcc对我说Cannot allocate memory了。简单的记录一下添加文件作为swap的步骤：\u003C\u002Fp>\u003Cul class=\" list-paddingleft-2\" style=\"list-style-type: disc;\">\u003Cli>\u003Cp>创建1个1GB的file\u003Cbr\u002F>\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>\u003Cpre class=\"brush:bash;toolbar:false\">sudo dd if=\u002Fdev\u002Fzero of=\u002Fmnt\u002F1GB.swap bs=1M count=1024\u003C\u002Fpre>\u003Cul class=\" list-paddingleft-2\" style=\"list-style-type: disc;\">\u003Cli>\u003Cp>格式化为Swap file\u003Cbr\u002F>\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>\u003Cpre class=\"brush:bash;toolbar:false\">sudo mkswap \u002Fmnt\u002F1GB.swap\u003C\u002Fpre>\u003Cul class=\" list-paddingleft-2\" style=\"list-style-type: disc;\">\u003Cli>\u003Cp>把swap file加入到系统中\u003Cbr\u002F>\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>\u003Cpre class=\"brush:bash;toolbar:false\">sudo swapon \u002Fmnt\u002F1GB.swap\u003C\u002Fpre>\u003Cul class=\" list-paddingleft-2\" style=\"list-style-type: disc;\">\u003Cli>\u003Cp>将swap永久添加\u003Cbr\u002F>在\u002Fect\u002Ffstab中加入新的Swap分区\u003Cbr\u002F>\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>\u003Cpre class=\"brush:bash;toolbar:false\">sudo gedit \u002Fetc\u002Ffstab\u003C\u002Fpre>\u003Cul class=\" list-paddingleft-2\" style=\"list-style-type: disc;\">\u003Cli>\u003Cp>在最后加入下列内容\u003Cbr\u002F>\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>\u003Cpre class=\"brush:bash;toolbar:false\">\u002Fmnt\u002F1GB.swap none swap sw 0 0\u003C\u002Fpre>\u003Cp>最后，free -m 命令可以看到swap的数据如下\u003C\u002Fp>\u003Cpre 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