{"id":11864,"date":"2022-10-02T17:05:36","date_gmt":"2022-10-02T08:05:36","guid":{"rendered":"https:\/\/prodskill.com\/?p=11864"},"modified":"2022-10-04T23:53:57","modified_gmt":"2022-10-04T14:53:57","slug":"oracle-dbms-parallel-execute-2-5-chunk-by-rowid-verify","status":"publish","type":"post","link":"https:\/\/prodskill.com\/de\/oracle-dbms-parallel-execute-2-5-chunk-by-rowid-verify\/","title":{"rendered":"2.5. Detailpr\u00fcfung der Aufteilung der Arbeitseinheiten (DBMS_PARALLEL_EXECUTE)"},"content":{"rendered":"<p>Dies bezieht sich auf die \u00dcberpr\u00fcfung der Details der Aufteilung der Arbeitseinheiten. Untersuchen Sie den Grad, in dem das Ergebnis der Division von Arbeitseinheiten (Chunks) durch ROWID gleichm\u00e4\u00dfig geteilt wird, ob die Summe der Arbeitseinheiten gleich dem Ganzen ist und ob es keine Auslassungen gibt, und die Korrelation zwischen der Anzahl der Arbeitseinheiten und die Zahl der Arbeitspl\u00e4tze.<\/p>\n\n\n\n<p>Dies ist eine Fortsetzung des vorherigen Artikels.<\/p>\n\n\n\n<p><a href=\"https:\/\/prodskill.com\/de\/oracle-dbms-parallel-execute-2-chunk-by-rowid\/\">2. Parallelverarbeitungsfall des ROWID-Divisionsverfahrens<\/a><\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">&lt;&lt;Inhaltsverzeichnis&gt;&gt;<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Inhaltsverzeichnis umschalten\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Umschalten<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/prodskill.com\/de\/oracle-dbms-parallel-execute-2-5-chunk-by-rowid-verify\/#25_%EC%9E%91%EC%97%85_%EB%8B%A8%EC%9C%84_%EB%B6%84%ED%95%A0_%EC%83%81%EC%84%B8_%ED%99%95%EC%9D%B8\" >2.5. Pr\u00fcfung der Details der Abteilung der Arbeitseinheit<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/prodskill.com\/de\/oracle-dbms-parallel-execute-2-5-chunk-by-rowid-verify\/#251_ROWID%EB%A1%9C_%EB%B6%84%ED%95%A0%ED%95%9C_%EC%9E%91%EC%97%85_%EB%8B%A8%EC%9C%84%EB%93%A4%EC%9D%98_%EA%B7%A0%EC%9D%BC%ED%95%9C_%EC%A0%95%EB%8F%84\" >2.5.1. Einheitlichkeit der durch ROWID partitionierten Arbeitseinheiten<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/prodskill.com\/de\/oracle-dbms-parallel-execute-2-5-chunk-by-rowid-verify\/#252_ROWID%EB%A1%9C_%EB%B6%84%ED%95%A0%ED%95%9C_%EC%9E%91%EC%97%85_%EB%8B%A8%EC%9C%84%EB%93%A4%EC%9D%B4_%EB%88%84%EB%9D%BD_%EC%97%86%EC%9D%8C_%ED%99%95%EC%9D%B8\" >2.5.2. Stellen Sie sicher, dass keine Arbeitseinheiten geteilt durch ROWID fehlen<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/prodskill.com\/de\/oracle-dbms-parallel-execute-2-5-chunk-by-rowid-verify\/#253_%EC%9E%91%EC%97%85_%EB%8B%A8%EC%9C%84Chunk%EC%9D%98_%EC%88%98%EC%99%80_%EC%9E%91%EC%97%85%EC%9D%98_PARALLEL_LEVEL_%EC%8B%A4%ED%96%89%ED%95%98%EB%8A%94_Job%EC%9D%98_%EA%B0%9C%EC%88%98%EA%B0%84%EC%9D%98_%EC%83%81%EA%B4%80%EA%B4%80%EA%B3%84\" >2.5.3. Korrelation zwischen der Anzahl der Arbeitseinheiten (Chunks) und dem PARALLEL_LEVEL (der Anzahl der auszuf\u00fchrenden Jobs)<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h3 class=\"wp-block-heading\" id=\"2.5._\uc791\uc5c5_\ub2e8\uc704_\ubd84\ud560_\uc0c1\uc138_\ud655\uc778\"><span class=\"ez-toc-section\" id=\"25_%EC%9E%91%EC%97%85_%EB%8B%A8%EC%9C%84_%EB%B6%84%ED%95%A0_%EC%83%81%EC%84%B8_%ED%99%95%EC%9D%B8\"><\/span>2.5. Pr\u00fcfung der Details der Abteilung der Arbeitseinheit<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Werfen wir einen Blick auf das Folgende, um zu sehen, ob die Arbeitseinheit gut aufgeteilt ist.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Einheitlichkeit der durch ROWID partitionierten Arbeitseinheiten<\/li><li>Stellen Sie sicher, dass keine Arbeitseinheiten geteilt durch ROWID fehlen<\/li><li>Korrelation zwischen der Anzahl der Arbeitseinheiten (Chunks) und dem PARALLEL_LEVEL (der Anzahl der auszuf\u00fchrenden Jobs)<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"2.5.1._ROWID\ub85c_\ubd84\ud560\ud55c_\uc791\uc5c5_\ub2e8\uc704\ub4e4\uc758_\uade0\uc77c\ud55c_\uc815\ub3c4\"><span class=\"ez-toc-section\" id=\"251_ROWID%EB%A1%9C_%EB%B6%84%ED%95%A0%ED%95%9C_%EC%9E%91%EC%97%85_%EB%8B%A8%EC%9C%84%EB%93%A4%EC%9D%98_%EA%B7%A0%EC%9D%BC%ED%95%9C_%EC%A0%95%EB%8F%84\"><\/span>2.5.1. Einheitlichkeit der durch ROWID partitionierten Arbeitseinheiten<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Die folgende Aufteilung bedeutet, die Tabelle Z_DPE_TEST_TAB basierend auf der ROW-Anzahl in 10.000 Arbeitseinheiten aufzuteilen.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">-- 2\ub2e8\uacc4: \uc791\uc5c5 \ub2e8\uc704 \ubd84\ud560\nBEGIN\n  DBMS_PARALLEL_EXECUTE.CREATE_CHUNKS_BY_ROWID(TASK_NAME   => 'DPE_TEST(BY ROWID)',\n                                               TABLE_OWNER => USER,\n                                               TABLE_NAME  => 'Z_DPE_TEST_TAB',\n                                               BY_ROW      => TRUE,\n                                               CHUNK_SIZE  => 10000);\nEND;\n\/<\/pre>\n\n\n\n<p>Mal sehen, ob es wirklich durch 10.000 geteilt wird.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">-- \uc791\uc5c5\ub2e8\uc704 \uac1c\uc218 \ud655\uc778 --> 115\nSELECT COUNT(*)\n  FROM USER_PARALLEL_EXECUTE_CHUNKS\nWHERE TASK_NAME = 'DPE_TEST(BY ROWID)';<\/pre>\n\n\n\n<p>Da die Gesamtzahl der Zeilen 1.000.000 betr\u00e4gt, scheint es, dass sie in 100 Bl\u00f6cke unterteilt werden sollte, wenn sie in 10.000 Zeilen unterteilt ist, aber in Wirklichkeit ist sie in 115 Bl\u00f6cke unterteilt.<\/p>\n\n\n\n<p>Wenn Sie die Zeilenanzahl f\u00fcr jeden Chunk berechnen,<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">SELECT  B.CHUNK_ID, COUNT(A.ID), MIN(A.ID) MIN_ID, MAX(A.ID) MAX_ID\n  FROM  Z_DPE_TEST_TAB A,\n        (\n        SELECT  CHUNK_ID, START_ROWID, END_ROWID\n          FROM  USER_PARALLEL_EXECUTE_CHUNKS\n         WHERE  TASK_NAME = 'DPE_TEST(BY ROWID)'\n        ) B\n WHERE  A.ROWID BETWEEN B.START_ROWID AND B.END_ROWID\n GROUP  BY B.CHUNK_ID\n ORDER  BY B.CHUNK_ID;<\/pre>\n\n\n\n<p>Sie k\u00f6nnen sehen, dass es in verschiedene Counts unterteilt ist, z. B. 1334, 2064 und 1886, nicht 10.000.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-51.png\"><img loading=\"lazy\" decoding=\"async\" width=\"883\" height=\"644\" src=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-51.png\" alt=\"chunk\ubcc4 row count\" class=\"wp-image-11865\" srcset=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-51.png 883w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-51-300x219.png 300w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-51-768x560.png 768w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-51-16x12.png 16w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-51-24x18.png 24w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-51-36x26.png 36w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-51-48x35.png 48w\" sizes=\"auto, (max-width: 883px) 100vw, 883px\" \/><\/a><figcaption>Zeilenanzahl pro Chunk<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Die Anzahl der im Block enthaltenen Zeilen betr\u00e4gt 14 im Abschnitt mit 1.000\u20132.000 Zeilen, 2 im Abschnitt mit 2.000 Zeilen, 33 im Abschnitt mit 6.000 Zeilen, 64 im Abschnitt mit 11.000 Zeilen und 2 im Abschnitt mit 12.000 Zeilen. (M\u00f6glicherweise ergibt es nicht jedes Mal das gleiche Ergebnis.)<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-52.png\"><img loading=\"lazy\" decoding=\"async\" width=\"573\" height=\"347\" src=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-52.png\" alt=\"Row\uc218 \uad6c\uac04\ubcc4 chunk\uc218\" class=\"wp-image-11866\" srcset=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-52.png 573w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-52-300x182.png 300w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-52-18x12.png 18w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-52-24x15.png 24w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-52-36x22.png 36w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-52-48x29.png 48w\" sizes=\"auto, (max-width: 573px) 100vw, 573px\" \/><\/a><figcaption>Number of Rows Anzahl der Chunks pro Abschnitt<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Als solches ist es nicht in eine v\u00f6llig gleiche Anzahl von Zeilen unterteilt. Dies scheint daran zu liegen, dass die ROWID-Partitionierungsmethode auf DBA_EXTENTS basiert und die Anzahl der in jedem EXTENT enthaltenen Bl\u00f6cke und die ROW-Anzahl jedes Blocks unterschiedlich sein k\u00f6nnen. Wenn durch DELETE usw. ungenutzte BLOCKS in der Tabelle vorhanden sind, kann ein ROWID-Abschnitt, in dem tats\u00e4chlich keine Daten vorhanden sind, als Chunk erstellt werden. Dies wird auch erwartet, wenn Daten gel\u00f6scht werden, nachdem sie DBA_EXTENT zugewiesen wurden, oder wenn EXTENTs zugewiesen wurden, aber keine eigentlichen Daten enthalten.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"2.5.2._ROWID\ub85c_\ubd84\ud560\ud55c_\uc791\uc5c5_\ub2e8\uc704\ub4e4\uc774_\ub204\ub77d_\uc5c6\uc74c_\ud655\uc778\"><span class=\"ez-toc-section\" id=\"252_ROWID%EB%A1%9C_%EB%B6%84%ED%95%A0%ED%95%9C_%EC%9E%91%EC%97%85_%EB%8B%A8%EC%9C%84%EB%93%A4%EC%9D%B4_%EB%88%84%EB%9D%BD_%EC%97%86%EC%9D%8C_%ED%99%95%EC%9D%B8\"><\/span>2.5.2. Stellen Sie sicher, dass keine Arbeitseinheiten geteilt durch ROWID fehlen<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>K\u00f6nnten Daten fehlen, wenn die Abschnitte START_ROWID und END_ROWID jedes Blocks maximiert werden?<\/p>\n\n\n\n<p>Lassen Sie uns zuerst die Zeilenanzahl \u00fcberpr\u00fcfen.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">-- Chunk\uc758 RowID range\ub85c \ucd94\ucd9c\ud55c Row Count\nSELECT  COUNT(A.ID) ROW_COUNT\n  FROM  Z_DPE_TEST_TAB A,\n        (\n        SELECT  CHUNK_ID, START_ROWID, END_ROWID\n          FROM  USER_PARALLEL_EXECUTE_CHUNKS\n         WHERE  TASK_NAME = 'DPE_TEST(BY ROWID)'\n        ) B\n WHERE  A.ROWID BETWEEN B.START_ROWID AND B.END_ROWID;<\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-53.png\"><img loading=\"lazy\" decoding=\"async\" width=\"883\" height=\"644\" src=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-53.png\" alt=\"row count \uc77c\uce58 \ud655\uc778\" class=\"wp-image-11867\" srcset=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-53.png 883w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-53-300x219.png 300w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-53-768x560.png 768w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-53-16x12.png 16w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-53-24x18.png 24w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-53-36x26.png 36w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-53-48x35.png 48w\" sizes=\"auto, (max-width: 883px) 100vw, 883px\" \/><\/a><figcaption>\u00dcberpr\u00fcfen Sie, ob die Zeilenanzahl \u00fcbereinstimmt<\/figcaption><\/figure>\n<\/div>\n\n\n<p>\u00dcbereinstimmung mit der Gesamtzeilenanzahl von 1.000.000, nachdem best\u00e4tigt wurde, dass die Anzahl nicht fehlte, und dann, basierend auf den im Bereich von START_ROWID bis END_ROWID des Chunks extrahierten Daten, wenn die urspr\u00fcnglichen Daten LEFT OUTER JOINed waren, fehlt (missing) ). sehen, ob die Daten vorhanden sind.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"sql\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\" data-no-auto-translation=\"\">-- Chunk\uc758 RowID\ub85c \ucd94\ucd9c\ud55c \ub370\uc774\ud130\uc758 \ub204\ub77d\uc5c6\uc74c \ud655\uc778\nSELECT  *\n  FROM  Z_DPE_TEST_TAB A LEFT OUTER JOIN\n        (\n        SELECT  A.ID  -- Chunk\uc758 RowID range\ub85c \ucd94\ucd9c\ud55c \ub370\uc774\ud130\n          FROM  Z_DPE_TEST_TAB A,\n                (\n                SELECT  CHUNK_ID, START_ROWID, END_ROWID\n                  FROM  USER_PARALLEL_EXECUTE_CHUNKS\n                 WHERE  TASK_NAME = 'DPE_TEST(BY ROWID)'\n                ) B\n         WHERE  A.ROWID BETWEEN B.START_ROWID AND B.END_ROWID\n        ) B ON (A.ID = B.ID)\n WHERE  B.ID IS NULL;<\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-54.png\"><img loading=\"lazy\" decoding=\"async\" width=\"883\" height=\"644\" src=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-54.png\" alt=\"\ub370\uc774\ud130 \ub204\ub77d \uc5c6\uc74c \ud655\uc778\" class=\"wp-image-11868\" srcset=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-54.png 883w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-54-300x219.png 300w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-54-768x560.png 768w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-54-16x12.png 16w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-54-24x18.png 24w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-54-36x26.png 36w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-54-48x35.png 48w\" sizes=\"auto, (max-width: 883px) 100vw, 883px\" \/><\/a><figcaption>Stellen Sie sicher, dass keine Daten fehlen<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Aus den obigen Ergebnissen ist ersichtlich, dass es keine fehlenden Daten gibt.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"2.5.3._\uc791\uc5c5_\ub2e8\uc704(Chunk)\uc758_\uc218\uc640_\uc791\uc5c5\uc758_PARALLEL_LEVEL_(\uc2e4\ud589\ud558\ub294_Job\uc758_\uac1c\uc218)\uac04\uc758_\uc0c1\uad00\uad00\uacc4\"><span class=\"ez-toc-section\" id=\"253_%EC%9E%91%EC%97%85_%EB%8B%A8%EC%9C%84Chunk%EC%9D%98_%EC%88%98%EC%99%80_%EC%9E%91%EC%97%85%EC%9D%98_PARALLEL_LEVEL_%EC%8B%A4%ED%96%89%ED%95%98%EB%8A%94_Job%EC%9D%98_%EA%B0%9C%EC%88%98%EA%B0%84%EC%9D%98_%EC%83%81%EA%B4%80%EA%B4%80%EA%B3%84\"><\/span>2.5.3. Korrelation zwischen der Anzahl der Arbeitseinheiten (Chunks) und dem PARALLEL_LEVEL (der Anzahl der auszuf\u00fchrenden Jobs)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>&lt;2.3. In Task Execution&gt; gab es folgenden Inhalt.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>PARALLEL_LEVEL bedeutet die Anzahl von Jobs, die gleichzeitig ausgef\u00fchrt werden sollen, d. h. den Parallelit\u00e4tsgrad (DOP), und kann gleich oder kleiner sein als die Anzahl von Chunks, die Arbeitseinheiten sind. Im gleichen Fall verarbeitet ein Job einen Chunk, und in einem kleinen Fall verarbeitet ein Job mehrere Chunks.<\/p><\/blockquote>\n\n\n\n<p>* Bezug: <a href=\"https:\/\/prodskill.com\/de\/oracle-dbms-parallel-execute-2-chunk-by-rowid\/#23_%EC%9E%91%EC%97%85_%EC%8B%A4%ED%96%89\">2. Parallelverarbeitungsfall der ROWID-Teilungsmethode_2.3. Job ausgef\u00fchrt<\/a><\/p>\n\n\n\n<p>Betrachten Sie die folgenden F\u00e4lle in Bezug auf die Anzahl der Chunks und die Anzahl der Jobs.<\/p>\n\n\n\n<p><strong>\u25bc Wenn die Anzahl der Chunks und die Anzahl der Jobs gleich sind (Chunk = Job)<\/strong><\/p>\n\n\n\n<p>Wenn ein Job die Ausf\u00fchrung des zugewiesenen Chunks abschlie\u00dft, endet er, da keine Jobs mehr ausgef\u00fchrt werden m\u00fcssen.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-55.png\"><img loading=\"lazy\" decoding=\"async\" width=\"637\" height=\"252\" src=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-55.png\" alt=\"Chunk\uc218\uc640 Job\uc218\uac00 \ub3d9\uc77c\ud55c \uacbd\uc6b0\" class=\"wp-image-11869\" srcset=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-55.png 637w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-55-300x119.png 300w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-55-18x7.png 18w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-55-24x9.png 24w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-55-36x14.png 36w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-55-48x19.png 48w\" sizes=\"auto, (max-width: 637px) 100vw, 637px\" \/><\/a><figcaption>Wenn die Anzahl der Chunks und die Anzahl der Jobs gleich sind<\/figcaption><\/figure>\n<\/div>\n\n\n<p><strong>\u25bc Wenn die Anzahl der Jobs geringer ist als die Anzahl der Chunks (Chunk &gt; Job)<\/strong><\/p>\n\n\n\n<p>Wenn der Job des Chunks, dem der Job zugewiesen ist, abgeschlossen ist, wird der Chunk, der noch nicht ausgef\u00fchrt wurde, zugewiesen und kontinuierlich ausgef\u00fchrt. Unten ist ein Beispiel, wenn es 3 Jobs gibt.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-56.png\"><img loading=\"lazy\" decoding=\"async\" width=\"648\" height=\"252\" src=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-56.png\" alt=\"Chunk\uc218\ubcf4\ub2e4 Job\uc218\uac00 \uc801\uc740 \uacbd\uc6b0 (Chunk &gt; Job)\" class=\"wp-image-11870\" srcset=\"https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-56.png 648w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-56-300x117.png 300w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-56-18x7.png 18w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-56-24x9.png 24w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-56-36x14.png 36w, https:\/\/prodskill.com\/wp-content\/uploads\/2022\/10\/image-56-48x19.png 48w\" sizes=\"auto, (max-width: 648px) 100vw, 648px\" \/><\/a><figcaption>Wenn die Anzahl der Jobs geringer ist als die Anzahl der Chunks (Chunk &gt; Job)<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Wenn die Anzahl der Jobs gr\u00f6\u00dfer ist als die Anzahl der Chunks (Chunk &lt; Job), ist dies au\u00dferdem m\u00f6glich, sollte jedoch besser nicht angewendet werden, da Chunks nicht zugewiesen werden und unn\u00f6tige Ressourcen verwendet werden k\u00f6nnen, indem der Status \u201eRunning\u201c beibehalten wird .<\/p>\n\n\n\n<p>* Bezug: <a href=\"https:\/\/docs.oracle.com\/cd\/E11882_01\/appdev.112\/e40758\/d_parallel_ex.htm#ARPLS67339\" target=\"_blank\" rel=\"noreferrer noopener\">Beispiel f\u00fcr DBMS_PARALLEL_EXECUTE Chunk nach ROWID<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<p>Bisher haben wir uns die ROWID-Partitionierungsmethode angesehen. Sehen Sie sich als N\u00e4chstes die NUMBER-Spaltenpartitionierungsmethode an.<\/p>","protected":false},"excerpt":{"rendered":"<p>Dies bezieht sich auf die \u00dcberpr\u00fcfung der Details der Aufteilung der Arbeitseinheiten. Untersuchen Sie den Grad, in dem das Ergebnis der Division von Arbeitseinheiten (Chunks) durch ROWID gleichm\u00e4\u00dfig geteilt wird, ob die Summe der Arbeitseinheiten gleich dem Ganzen ist und ob es keine Auslassungen gibt, und die Korrelation zwischen der Anzahl der Arbeitseinheiten und die Zahl der Arbeitspl\u00e4tze. Dies ist eine Fortsetzung des vorherigen Artikels. 2. Parallelverarbeitungsfall des ROWID-Divisionsverfahrens 2.5. Geteilte Arbeitseinheit...<\/p>","protected":false},"author":1,"featured_media":11866,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[246,242,243,244,245],"class_list":["post-11864","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oracle","tag-dml-","tag-oracle","tag-dbms_parallel_execute","tag-244","tag-dml-parallel-processing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2.5. \uc791\uc5c5 \ub2e8\uc704 \ubd84\ud560 \uc0c1\uc138 \ud655\uc778 (DBMS_PARALLEL_EXECUTE) - \uc0dd\uc0b0\uc131 Skill<\/title>\n<meta name=\"description\" content=\"\uc791\uc5c5 \ub2e8\uc704 \ubd84\ud560 \uc0c1\uc138 \ud655\uc778 \uad00\ub828 \ub0b4\uc6a9\uc774\ub2e4. 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