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IP屬地：廣東
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echo N>/proc/sys/vm/drop_caches清理緩存echo N > /proc/sys/vm/drop_caches , 當(dāng)N數(shù)值不同時，free –m存在差異 1.1、echo寫入數(shù)值之前—free-m內(nèi)容首先查看/pro...
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Mybatis中的OGNL使用總結(jié)Mybatis中的OGNL使用總結(jié) Mybatis中常用的OGNL表達(dá)式有以下： 在一定意義上說，mybatis中的動態(tài)sql也是基于OGNL表達(dá)式的。其中常用的元素有如下幾...
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[Netty源碼分析]ByteBuf(總結(jié))ByteBuf的分類(等同:Netty的內(nèi)存類別有哪些?) 堆內(nèi)和堆外:堆內(nèi)基于Byte字節(jié)數(shù)組進(jìn)行分配,堆外基于JDK的directByteBuf進(jìn)行分配 Safe和Uns...
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[Netty源碼分析]Netty解碼(一)解碼,即將二進(jìn)制流解碼為ByteBuf然后進(jìn)行業(yè)務(wù)邏輯的處理Q:解碼器抽象的解碼過程?Q:拆箱即用的解碼器有哪些？ ByteToMessageDecoder解碼步驟 累加字節(jié)...
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[Netty源碼分析]ByteBuf(四)Arena Chunk Page SubPage Arena 結(jié)構(gòu):最外層是一個ChunkList，ChunkList通過鏈表連接,Chunk大小16M,采取這種結(jié)構(gòu)是Net...
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[Netty源碼分析]ByteBuf(三)內(nèi)存規(guī)格0->512B->8K->16M(tiny-->small-->normal-->huge)所有內(nèi)存分配以chunk(16M)形式向操作系統(tǒng)申請分配內(nèi)存,8K作為一個...
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[Netty源碼分析]ByteBuf(二)
ByteBufAllocator ByteBufAllocator是字節(jié)緩沖區(qū)分配器，根據(jù)Netty字節(jié)緩沖區(qū)的實(shí)現(xiàn)不同，分為兩種不同的分配器PooledByteBufAll...
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[Netty源碼分析]ByteBuf(一)java.nio.ByteBuffer缺點(diǎn) 長度固定,ByteBuffer一旦分配完成，他的容量不能動態(tài)擴(kuò)展和收縮，當(dāng)需要編碼的POJO對象大于ByteBuffer容量是，會...
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[Netty源碼分析]EventLoopQUESTION: 默認(rèn)情況下Netty服務(wù)端起多少線程?何時啟動? Netty如何解決JDK空輪訓(xùn)BUG? Netty如何保證異步串行無鎖化?(待完善) NioEventL...
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老熊都要搞PHP啦，多語言全棧么？
PHP連接數(shù)據(jù)庫實(shí)現(xiàn)插入數(shù)據(jù)操作
存儲過程非常簡單，登入的話自己實(shí)現(xiàn)一下。
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歡迎大家投稿Elasticsearch相關(guān)文章。
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微服務(wù)和SOA相關(guān)的理論知識和技術(shù)知識，spring cloud，spring boot，dubbo，rpc，thrift，protobuf，gRPC，分布式事務(wù)，DDD,k8s,kubernetes,etcd,consul等等
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本人公眾號 “華仔聊技術(shù)”<br><br>十年互聯(lián)網(wǎng)人，個人IP&公眾號博主，主攻中間件相關(guān)硬核技術(shù)<br><br>公眾號kafka系列文章:<br><a href="https://links.jianshu.com/go?to=https%3A%2F%2Fmp.weixin.qq.com%2Fmp%2Fappmsgalbum%3F__biz%3DMzg3MTcxMDgxNA%3D%3D%26action%3Dgetalbum%26album_id%3D2147575846151290880%26scene%3D173%26from_msgid%3D2247488854%26from_itemidx%3D1%26count%3D3%26nolastread%3D1%23wechat_redirect" target="_blank">https://mp.weixin.qq.com/mp/appmsgalbum?__biz=Mzg3MTcxMDgxNA==&action=getalbum&album_id=2147575846151290880&scene=173&from_msgid=2247488854&from_itemidx=1&count=3&nolastread=1#wechat_redirect</a> 歡迎關(guān)注<br><br><br>github:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fgithub.com%2Fmenghuan" target="_blank">https://github.com/menghuan</a><br>PHP7/Redis5/Nginx/Linux源碼分析匯總鏈接:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fgithub.com%2Fmenghuan%2Flnmp-code-analysis" target="_blank">https://github.com/menghuan/lnmp-code-analysis</a><br><br>最近在寫的一款go cron工具：<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fgithub.com%2Fmenghuan%2FgoDistributedCron" target="_blank">https://github.com/menghuan/goDistributedCron</a> 基本完成 后續(xù)會添加微服務(wù)相關(guān)設(shè)計(jì) 歡迎star<br><a href="https://links.jianshu.com/go?to=https%3A%2F%2Fgithub.com%2Fmenghuan%2Fgo-distributed-cron-fronted" target="_blank">https://github.com/menghuan/go-distributed-cron-fronted</a> go-cron vue管理后臺 待完善 歡迎star<br><br>友情鏈接<br>歐神的博客 <a href="https://links.jianshu.com/go?to=https%3A%2F%2Fblog.changkun.de%2F" target="_blank">https://blog.changkun.de/</a><br>碼農(nóng)桃花源 <a href="https://links.jianshu.com/go?to=https%3A%2F%2Fqcrao.com%2F" target="_blank">https://qcrao.com/</a><br>曹大的博客 <a href="https://links.jianshu.com/go?to=http%3A%2F%2Fxargin.com%2F" target="_blank">http://xargin.com/</a><br>面向信仰編程 <a href="https://links.jianshu.com/go?to=https%3A%2F%2Fdraveness.me" target="_blank">https://draveness.me</a><br>煎魚 <a href="https://links.jianshu.com/go?to=https%3A%2F%2Feddycjy.com%2Fposts%2F" target="_blank">https://eddycjy.com/posts/</a><br>達(dá)神的博客 <a href="https://links.jianshu.com/go?to=http%3A%2F%2Fwww.weisd.in%2F" target="_blank">http://www.weisd.in/</a><br>陳捷的博客 <a href="https://links.jianshu.com/go?to=http%3A%2F%2Fwww.chenjie.info%2F" target="_blank">http://www.chenjie.info/</a><br>夢康的博客 <a href="https://links.jianshu.com/go?to=https%3A%2F%2Fmengkang.net%2F" target="_blank">https://mengkang.net/</a><br>濤哥博客 <a href="https://links.jianshu.com/go?to=http%3A%2F%2Fwww.tiyee.net%2F" target="_blank">http://www.tiyee.net/</a><br>周至博客 <a href="https://links.jianshu.com/go?to=http%3A%2F%2Fwww.sunnysmilez.cn%2F" target="_blank">http://www.sunnysmilez.cn/</a><br>朱小廝博客 <a href="https://links.jianshu.com/go?to=https%3A%2F%2Fblog.csdn.net%2Fu013256816%2Farticle%2Fdetails%2F54743481" target="_blank">https://blog.csdn.net/u013256816/article/details/54743481</a><br>鯉魚的博客:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fwww.iamle.com" target="_blank">https://www.iamle.com</a><br>數(shù)據(jù)庫內(nèi)核月報<a href="https://links.jianshu.com/go?to=http%3A%2F%2Fmysql.taobao.org%2Fmonthly%2F" target="_blank">http://mysql.taobao.org/monthly/</a><br>全棧技術(shù):<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fblog.thankbabe.com%2F" target="_blank">https://blog.thankbabe.com/</a><br>美團(tuán)技術(shù)博客:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Ftech.meituan.com%2F" target="_blank">https://tech.meituan.com/</a><br>阿里中間件團(tuán)隊(duì)博客:<a href="https://links.jianshu.com/go?to=http%3A%2F%2Fjm.taobao.org%2F" target="_blank">http://jm.taobao.org/</a><br>運(yùn)維社區(qū):<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fwww.unixhot.com%2F" target="_blank">https://www.unixhot.com/</a><br>cacheCloud:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fcachecloud.github.io%2F" target="_blank">https://cachecloud.github.io/</a><br>go知識圖譜:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fwww.processon.com%2Fview%2Flink%2F5a9ba4c8e4b0a9d22eb3bdf0" target="_blank">https://www.processon.com/view/link/5a9ba4c8e4b0a9d22eb3bdf0</a><br>go語言分析 <a href="https://links.jianshu.com/go?to=https%3A%2F%2Fgithub.com%2Fchangkun%2Fgo-under-the-hood%2Fblob%2Fmaster%2Fbook%2Fzh-cn%2FTOC.md" target="_blank">https://github.com/changkun/go-under-the-hood/blob/master/book/zh-cn/TOC.md</a><br>后端架構(gòu)體系:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fgithub.com%2Fxingshaocheng%2Farchitect-awesome" target="_blank">https://github.com/xingshaocheng/architect-awesome</a><br>架構(gòu)師技術(shù)圖譜:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fgithub.com%2Ftoutiaoio%2Fawesome-architecture" target="_blank">https://github.com/toutiaoio/awesome-architecture</a><br>互聯(lián)網(wǎng) Java 工程師進(jìn)階知識完全掃盲:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fgithub.com%2Fdoocs%2Fadvanced-java" target="_blank">https://github.com/doocs/advanced-java</a><br>從Docker到Kubernetes進(jìn)階:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fwww.qikqiak.com%2Fk8s-book%2F" target="_blank">https://www.qikqiak.com/k8s-book/</a>
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大眾點(diǎn)評訂單分庫分表實(shí)踐
轉(zhuǎn)載:大眾點(diǎn)評訂單分庫分表實(shí)踐 背景 訂單單表早已突破兩百G，因查詢維度較多，即使加了兩個從庫，各種索引優(yōu)化，依然存在很多查詢不理想的情況；加之去年大量的搶購活動的開展，數(shù)據(jù)...
