{"id":5023,"date":"2021-06-30T09:36:35","date_gmt":"2021-06-30T01:36:35","guid":{"rendered":"https:\/\/nj.transwarp.cn:8180\/?p=5023"},"modified":"2024-02-22T09:28:05","modified_gmt":"2024-02-22T01:28:05","slug":"jmap-histo-%e7%9a%84%e5%88%86%e6%9e%90%e6%80%9d%e8%b7%af%e4%bb%a5%e5%8f%8a%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9","status":"publish","type":"post","link":"https:\/\/kbwp.transwarp.cn\/?p=5023","title":{"rendered":"jmap -histo:live \u7684\u5206\u6790\u601d\u8def"},"content":{"rendered":"

\u6982\u8981\u63cf\u8ff0<\/h3>\n
\n

Inceptor Server \u4f5c\u4e3a TDH \u4e2d\u6838\u5fc3\u7ec4\u4ef6\uff0c\u8d1f\u8f7d\u4e00\u822c\u90fd\u5f88\u9ad8\uff0c\u7ecf\u5e38\u4f1a\u51fa\u73b0 GC \u76f8\u5173\u7684\u95ee\u9898\uff0c\u672c\u6848\u4f8b\u63d0\u4f9b\u4e00\u4e9b Inceptor Server \u7684 jmap \u7684\u5206\u6790\u601d\u8def\u4ee5\u53ca\u6ce8\u610f\u4e8b\u9879\uff0c\u6700\u540e\u4f1a\u5217\u51fa\u6765\u4e00\u4e9b\u5e38\u89c1\u7684 GC \u76f8\u5173\u7684\u5df2\u77e5\u95ee\u9898\uff1b<\/p>\n

\u8be6\u7ec6\u8bf4\u660e<\/h3>\n
\n

\u672c\u6848\u4f8b\u4e3b\u8981\u5305\u542b\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n

    \n
  1. \u5982\u4f55\u6536\u96c6 jmap<\/li>\n
  2. \u901a\u8fc7 jmap \u80fd\u5206\u6790\u51fa\u4ec0\u4e48<\/li>\n
  3. \u5982\u4f55\u5206\u6790 jmap<\/li>\n
  4. Inceptor Server \u5e38\u89c1\u7684 GC \u76f8\u5173\u95ee\u9898<\/li>\n<\/ol>\n

    \u5982\u4f55\u6536\u96c6 jmap<\/h4>\n

    \u672c\u6848\u4f8b\u65e8\u5728\u7b80\u5355\u7684\u5206\u6790\u4e00\u4e0b jmap histo \u4fe1\u606f\uff0c\u6240\u4ee5\u53ea\u9700\u8981\u6536\u96c6 jmap -histo:live \u5373\u53ef<\/p>\n

    # pid=jps |grep InceptorServer2 |awk {'print $1'}<\/code>\n# sudo -u hive jmap -histo:live $pid<\/code><\/pre>\n
    \u66f4\u8be6\u7ec6\u7684\u53c2\u8003\u5982\u4e0b\u8fde\u63a5 \uff1aJVM\u7684\u5185\u5b58\u5206\u6790\u547d\u4ee4\u89e3\u6790<\/a><\/p>\n
    \u901a\u8fc7 jmap \u80fd\u5206\u6790\u51fa\u4ec0\u4e48<\/h4>\n
    jmap Histogram \u7684\u4e3b\u8981\u4f5c\u7528\u662f\u67e5\u770b instance \u7684\u6570\u91cf\u548c\u5927\u5c0f\uff0c\u4e00\u822c\u7528\u6765\u67e5\u770b\u5e94\u7528\u7a0b\u5e8f\u521b\u5efa\u7684\u7c7b\u5b9e\u4f8b\u7684\u4e2a\u6570\u548c\u5b9e\u4f8b\u5360\u7528\u5927\u5c0f<\/strong>\uff0cjdk \u76f8\u5173\u7c7b\u53ef\u4ee5\u5ffd\u7565\uff1b
    \njmap Histogram \u9ed8\u8ba4\u6309\u7167\u5b9e\u4f8b\u5360\u7528\u5927\u5c0f\u6392\u5e8f\u7684\uff0c\u53ef\u4ee5\u5f88\u5bb9\u6613\u770b\u5230\u5360\u7528\u5185\u5b58\u6700\u591a\u7684\u5bf9\u8c61<\/strong>\uff1b
    \njmap Histogram \u6700\u540e\u4e00\u884c\u662f\u7edf\u8ba1\u4fe1\u606f\uff0cTotal\uff0c\u53ef\u4ee5\u770b\u5230 jvm \u5f53\u524d\u6240\u6709\u5bf9\u8c61\u5360\u7528\u7684\u5927\u5c0f<\/strong>\uff1b<\/p>\n
    \u5982\u4f55\u5206\u6790 jmap<\/h4>\n
    \u53ea\u5173\u6ce8\u6211\u4eec\u80fd\u770b\u61c2\u7684\u90e8\u5206\uff0c\u6570\u91cf\uff08instance\uff09\uff0c\u5927\u5c0f\uff08bytes\uff09\uff0c\u7c7b\u5bf9\u8c61\uff08class name\uff09\uff1b<\/p>\n
    \u56e0\u4e3a\u4e0d\u50cfc++\u7684\u5bf9\u8c61\u672c\u8eab\u53ef\u4ee5\u5b58\u653e\u5927\u91cf\u5185\u5b58\uff0cjava \u7684\u5bf9\u8c61\u6210\u5458\u90fd\u662f\u4e9b\u5f15\u7528\uff0c\u771f\u6b63\u7684\u5185\u5b58\u90fd\u5728\u5806\u4e0a\uff0c\u770b\u8d77\u6765\u5c31\u662f\u4e00\u5806\u539f\u751f\u7684byte[], char[], int[]\uff0c\u6240\u4ee5\u6211\u4eec\u770b\u5230 Histogram \u56fe\u6392\u5728\u524d\u9762\u7684\u5f80\u5f80\u662f char[]\u3001byte[] \uff1b\u56e0\u6b64\u5982\u679c\u6211\u4eec\u53ea\u770b\u5bf9\u8c61\u672c\u8eab\uff0c\u4f1a\u53d1\u73b0\u5185\u5b58\u90fd\u5f88\u5c0f\uff0c\u6b64\u65f6\u6211\u4eec\u9700\u8981\u5173\u6ce8\u5b9e\u4f8b\u5bf9\u8c61\u7684 instance \u6570\u91cf\uff1b<\/p>\n
    \u6240\u4ee5\u6211\u4eec\u53ea\u9700\u8981\u5173\u6ce8\u6570\u91cf\u5f02\u5e38\u591a\u7684\uff0c\u5e76\u4e14\u548c\u670d\u52a1\uff08Inceptor\uff09\u76f8\u5173\u7684 class\uff1b<\/strong><\/font><\/p>\n
    \u4e3e\u4f8b\u8bf4\u660e\u4e00\u4e0b<\/h4>\n
    \u4e0b\u56fe\u4e2d [C \u5360\u7528\u6bd4\u8f83\u591a\uff0c\u4f46\u662f\u5e76\u6ca1\u529e\u6cd5\u770b\u5230\u5177\u4f53\u5185\u5bb9\uff0c\u6240\u4ee5\u5f80\u4e0b\u627e\u548c\u670d\u52a1\uff08Inceptor\uff09\u76f8\u5173\u7684\uff0c\u6709metastore.api<\/code>\u548c metastore.api.Partition<\/code>\u3001hadoop.fs.FileSystem<\/code>\u3001hive.ql.parse<\/code>\uff1b
    \n\u53ef\u4ee5\u5411\u591a\u7ea7\u5206\u533a\/\u5c0f\u6587\u4ef6\u3001\u590d\u6742sql \/ sql\u5e76\u53d1\u65b9\u5411\u8003\u8651\uff1b<\/p>\n
    \"file\"<\/p>\n
    \u4e0b\u56fe\u4e2d\uff0chadoop.fs.FileSystem<\/code> \u5360\u7528\u5f88\u5927\uff0c\u8bf4\u660e\u5e94\u8be5\u662f hdfs \u6587\u4ef6\u4fe1\u606f\u5360\u7528\uff0c\u5177\u4f53\u7684\u53ef\u4ee5\u770b\u5230\uff0c java.net.URI \u548c org.apache.hadoop.fs.Path<\/code> \u7684\u6570\u91cf\u57fa\u672c\u76f8\u7b49\uff0c\u4e14\u8fbe\u5230 230W+ \uff0c\u5e94\u8be5\u662f hdfs \u6587\u4ef6\u8def\u5f84\u4fe1\u606f\uff0c\u53ef\u4ee5\u5411\u5c0f\u6587\u4ef6\u592a\u591a\u65b9\u5411\u6392\u67e5\uff1b<\/p>\n
    \"file\"<\/p>\n
    \u4e0b\u56fe\u4e2d\uff0c\u867d\u7136\u6392\u540d\u9760\u524d\u7684\u4e24\u4e2a\u662f\u5177\u4f53\u7684 class \uff0c\u5982\u679c\u770b\u4e0d\u61c2\uff0c\u53ef\u4ee5 Baidu \u4e00\u4e0b\u770b\u770b\uff0c\u7136\u540e\u6211\u4eec\u5728\u5f80\u4e0b\u770b\uff0c\u53ef\u4ee5\u770b\u5230  io.transwarp.holodesk.storage.ds.column.block.filter.MinMaxBlockFilter<\/code> \u5f88\u591a\uff0c\u8fd9\u79cd\u60c5\u51b5\u5e94\u8be5\u662f\u6709\u9891\u7e41\u7684 holodesk \u5199\u5165\u64cd\u4f5c\uff0c\u7ed3\u5408\u524d\u9762\u4e24\u4e2a\u9760\u524d\u7684spark.Clean<\/code> \u76f8\u5173class\uff0c\u53ef\u4ee5\u5411\u9ad8\u5e76\u53d1\u7684 holodesk \u5199\u5165\u65b9\u5411\u6392\u67e5\u3002<\/p>\n
    \"file\"<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u6982\u8981\u63cf\u8ff0 Inceptor Server \u4f5c\u4e3a TDH \u4e2d\u6838\u5fc3\u7ec4\u4ef6\uff0c\u8d1f\u8f7d\u4e00\u822c\u90fd\u5f88\u9ad8\uff0c\u7ecf\u5e38\u4f1a\u51fa\u73b0 GC \u76f8\u5173\u7684\u95ee ..<\/p>\n
    <\/div>\n
    Read more<\/a><\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5023","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5023","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5023"}],"version-history":[{"count":4,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5023\/revisions"}],"predecessor-version":[{"id":11969,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5023\/revisions\/11969"}],"wp:attachment":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5023"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5023"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5023"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}