{"id":60513,"date":"2024-10-13T03:29:22","date_gmt":"2024-10-12T19:29:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60513\/"},"modified":"2024-10-13T03:29:22","modified_gmt":"2024-10-12T19:29:22","slug":"db2%e7%ae%a1%e7%90%86%e8%a1%a8%e7%a9%ba%e9%96%93%e7%9a%84%e9%ab%98%e6%b0%b4%e4%bd%8d%e6%a8%99%e8%a8%98%e9%99%8d%e4%bd%8e%e7%9a%84%e6%93%8d%e4%bd%9c%e6%ad%a5%e9%a9%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60513\/","title":{"rendered":"DB2\u7ba1\u7406\u8868\u7a7a\u9593\u7684\u9ad8\u6c34\u4f4d\u6a19\u8a18\u964d\u4f4e\u7684\u64cd\u4f5c\u6b65\u9a5f"},"content":{"rendered":"

DB2\u7ba1\u7406\u8868\u7a7a\u9593\u7684\u9ad8\u6c34\u4f4d\u6a19\u8a18\u964d\u4f4e\u7684\u64cd\u4f5c\u6b65\u9a5f<\/h1>\n

\u5728DB2\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u8868\u7a7a\u9593\u7684\u9ad8\u6c34\u4f4d\u6a19\u8a18\uff08High Water Mark, HWM\uff09\u662f\u6307\u8868\u7a7a\u9593\u4e2d\u5df2\u4f7f\u7528\u7684\u6700\u5927\u9801\u9762\u6578\u91cf\u3002\u96a8\u8457\u6578\u64da\u7684\u63d2\u5165\u548c\u522a\u9664\uff0cHWM\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u548c\u5b58\u5132\u6548\u7387\u3002\u56e0\u6b64\uff0c\u964d\u4f4eHWM\u662f\u4e00\u500b\u91cd\u8981\u7684\u7dad\u8b77\u4efb\u52d9\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u6709\u6548\u5730\u964d\u4f4eDB2\u8868\u7a7a\u9593\u7684\u9ad8\u6c34\u4f4d\u6a19\u8a18\u3002<\/p>\n

\u9ad8\u6c34\u4f4d\u6a19\u8a18\u7684\u6982\u5ff5<\/h2>\n

\u9ad8\u6c34\u4f4d\u6a19\u8a18\u662fDB2\u7528\u4f86\u8ffd\u8e64\u8868\u7a7a\u9593\u4e2d\u5df2\u4f7f\u7528\u9801\u9762\u7684\u6307\u6a19\u3002\u7576\u6578\u64da\u88ab\u522a\u9664\u6642\uff0c\u9019\u4e9b\u9801\u9762\u4e0d\u6703\u7acb\u5373\u91cb\u653e\uff0cHWM\u4ecd\u7136\u4fdd\u6301\u5728\u522a\u9664\u524d\u7684\u6700\u5927\u503c\u3002\u9019\u53ef\u80fd\u5c0e\u81f4\u7a7a\u9593\u7684\u6d6a\u8cbb\uff0c\u4e26\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\u3002\u56e0\u6b64\uff0c\u5b9a\u671f\u964d\u4f4eHWM\u662f\u5fc5\u8981\u7684\u3002<\/p>\n

\u964d\u4f4e\u9ad8\u6c34\u4f4d\u6a19\u8a18\u7684\u6b65\u9a5f<\/h2>\n

1. \u78ba\u8a8d\u7576\u524d\u7684\u9ad8\u6c34\u4f4d\u6a19\u8a18<\/h3>\n

\u5728\u9032\u884c\u4efb\u4f55\u64cd\u4f5c\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u78ba\u8a8d\u7576\u524d\u7684\u9ad8\u6c34\u4f4d\u6a19\u8a18\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u6aa2\u67e5\uff1a<\/p>\n

SELECT TBSP_NAME, HWM_PAGES, TOTAL_PAGES \nFROM SYSIBM.SYSTABLESPACE \nWHERE TBSP_NAME = '\u4f60\u7684\u8868\u7a7a\u9593\u540d\u7a31';<\/code><\/pre>\n
2. \u522a\u9664\u4e0d\u5fc5\u8981\u7684\u6578\u64da<\/h3>\n
\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u6578\u64da\u662f\u964d\u4f4eHWM\u7684\u7b2c\u4e00\u6b65\u3002\u53ef\u4ee5\u4f7f\u7528DELETE\u8a9e\u53e5\u4f86\u522a\u9664\u7279\u5b9a\u7684\u8a18\u9304\uff1a<\/p>\n
DELETE FROM \u4f60\u7684\u8868\u540d\u7a31 \nWHERE \u689d\u4ef6;<\/code><\/pre>\n
\u5728\u522a\u9664\u6578\u64da\u5f8c\uff0cHWM\u4e0d\u6703\u81ea\u52d5\u964d\u4f4e\uff0c\u56e0\u6b64\u9700\u8981\u9032\u884c\u4e0b\u4e00\u6b65\u3002<\/p>\n
3. \u91cd\u7d44\u8868\u7a7a\u9593<\/h3>\n
\u91cd\u7d44\u8868\u7a7a\u9593\u662f\u964d\u4f4eHWM\u7684\u6709\u6548\u65b9\u6cd5\u3002\u53ef\u4ee5\u4f7f\u7528REORG\u547d\u4ee4\u4f86\u91cd\u7d44\u8868\u7a7a\u9593\uff0c\u9019\u5c07\u91cb\u653e\u672a\u4f7f\u7528\u7684\u9801\u9762\u4e26\u964d\u4f4eHWM\uff1a<\/p>\n
REORG TABLESPACE \u4f60\u7684\u8868\u7a7a\u9593\u540d\u7a31;<\/code><\/pre>\n
\u91cd\u7d44\u904e\u7a0b\u4e2d\uff0cDB2\u6703\u91cd\u65b0\u6392\u5217\u6578\u64da\u4e26\u91cb\u653e\u672a\u4f7f\u7528\u7684\u9801\u9762\uff0c\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u964d\u4f4eHWM\u3002<\/p>\n
4. \u78ba\u8a8dHWM\u5df2\u964d\u4f4e<\/h3>\n
\u5728\u91cd\u7d44\u5b8c\u6210\u5f8c\uff0c\u518d\u6b21\u6aa2\u67e5\u9ad8\u6c34\u4f4d\u6a19\u8a18\u4ee5\u78ba\u8a8d\u5176\u5df2\u964d\u4f4e\uff1a<\/p>\n
SELECT TBSP_NAME, HWM_PAGES, TOTAL_PAGES \nFROM SYSIBM.SYSTABLESPACE \nWHERE TBSP_NAME = '\u4f60\u7684\u8868\u7a7a\u9593\u540d\u7a31';<\/code><\/pre>\n
5. \u5b9a\u671f\u7dad\u8b77<\/h3>\n
\u70ba\u4e86\u4fdd\u6301\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u5efa\u8b70\u5b9a\u671f\u9032\u884cHWM\u7684\u7dad\u8b77\u3002\u53ef\u4ee5\u8a2d\u7f6e\u5b9a\u671f\u4efb\u52d9\u4f86\u81ea\u52d5\u57f7\u884c\u6578\u64da\u522a\u9664\u548c\u91cd\u7d44\u64cd\u4f5c\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u964d\u4f4eDB2\u8868\u7a7a\u9593\u7684\u9ad8\u6c34\u4f4d\u6a19\u8a18\u662f\u4e00\u500b\u91cd\u8981\u7684\u7dad\u8b77\u4efb\u52d9\uff0c\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u5b58\u5132\u6548\u7387\u3002\u901a\u904e\u78ba\u8a8d\u7576\u524dHWM\u3001\u522a\u9664\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u3001\u91cd\u7d44\u8868\u7a7a\u9593\u4ee5\u53ca\u5b9a\u671f\u7dad\u8b77\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406DB2\u7684\u8868\u7a7a\u9593\u3002<\/p>\n
\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dcVPS<\/code>\u3001\u9999\u6e2fVPS<\/code>\u53ca\u5176\u4ed6\u670d\u52a1\u5668<\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3DB2\u7ba1\u7406\u8868\u7a7a\u9593\u9ad8\u6c34\u4f4d\u6a19\u8a18\u964d\u4f4e\u7684\u64cd\u4f5c\u6b65\u9a5f\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\uff0c\u512a\u5316\u5b58\u5132\u7a7a\u9593\u4f7f\u7528\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60513","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60513","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=60513"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60513\/revisions"}],"predecessor-version":[{"id":60514,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60513\/revisions\/60514"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}