{"id":855,"date":"2026-04-01T14:18:05","date_gmt":"2026-04-01T11:18:05","guid":{"rendered":"https:\/\/oraclius.com.tr\/?p=855"},"modified":"2026-04-01T14:18:06","modified_gmt":"2026-04-01T11:18:06","slug":"oracle-19c-en-onemli-50-wait-event","status":"publish","type":"post","link":"https:\/\/oraclius.com.tr\/tr\/oracle-19c-en-onemli-50-wait-event\/","title":{"rendered":"ORACLE 19c \u2013 En \u00d6nemli 50 Wait Event"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\ud83d\udcc0 I\/O (Disk) Event\u2019leri<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>db file sequential read<\/strong> \u2192 Tek blok okuma (index access)<\/li>\n\n\n\n<li><strong>db file scattered read<\/strong> \u2192 \u00c7oklu blok okuma (full scan)<\/li>\n\n\n\n<li><strong>direct path read<\/strong> \u2192 PGA \u00fczerinden direkt okuma<\/li>\n\n\n\n<li><strong>direct path write<\/strong> \u2192 PGA \u00fczerinden direkt yazma<\/li>\n\n\n\n<li><strong>direct path read temp<\/strong> \u2192 Temp tablespace\u2019ten okuma<\/li>\n\n\n\n<li><strong>direct path write temp<\/strong> \u2192 Temp\u2019e yazma (sort\/hash)<\/li>\n\n\n\n<li><strong>log file parallel write<\/strong> \u2192 Redo log diske yaz\u0131l\u0131yor<\/li>\n\n\n\n<li><strong>log file single write<\/strong> \u2192 Tek redo write<\/li>\n\n\n\n<li><strong>control file sequential read<\/strong> \u2192 Control file tekli okuma<\/li>\n\n\n\n<li><strong>control file parallel write<\/strong> \u2192 Control file yazma<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udcbe Commit \/ Redo<\/h2>\n\n\n\n<ol start=\"11\" class=\"wp-block-list\">\n<li><strong>log file sync<\/strong> \u2192 Commit bekliyor (\u00e7ok kritik)<\/li>\n\n\n\n<li><strong>log buffer space<\/strong> \u2192 Redo buffer dolu<\/li>\n\n\n\n<li><strong>log file switch (checkpoint incomplete)<\/strong> \u2192 Checkpoint yeti\u015fmedi<\/li>\n\n\n\n<li><strong>log file switch completion<\/strong> \u2192 Log switch bekleniyor<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd12 Concurrency (Lock &amp; Latch)<\/h2>\n\n\n\n<ol start=\"15\" class=\"wp-block-list\">\n<li><strong>enq: TX &#8211; row lock contention<\/strong> \u2192 Sat\u0131r kilidi bekleme<\/li>\n\n\n\n<li><strong>enq: TM &#8211; contention<\/strong> \u2192 Tablo lock bekleme<\/li>\n\n\n\n<li><strong>latch: cache buffers chains<\/strong> \u2192 Hot block contention<\/li>\n\n\n\n<li><strong>latch free<\/strong> \u2192 Genel latch bekleme<\/li>\n\n\n\n<li><strong>buffer busy waits<\/strong> \u2192 Ayn\u0131 block\u2019a eri\u015fim \u00e7ak\u0131\u015fmas\u0131<\/li>\n\n\n\n<li><strong>read by other session<\/strong> \u2192 Ba\u015fkas\u0131 okuyor, sen bekliyorsun<\/li>\n\n\n\n<li><strong>gc buffer busy acquire<\/strong> \u2192 RAC block contention<\/li>\n\n\n\n<li><strong>gc buffer busy release<\/strong> \u2192 RAC block release bekleme<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\udde0 Library Cache \/ Parse<\/h2>\n\n\n\n<ol start=\"23\" class=\"wp-block-list\">\n<li><strong>library cache lock<\/strong> \u2192 Obje lock bekleme<\/li>\n\n\n\n<li><strong>library cache pin<\/strong> \u2192 Obje kullan\u0131m bekleme<\/li>\n\n\n\n<li><strong>cursor: pin S wait on X<\/strong> \u2192 Cursor contention<\/li>\n\n\n\n<li><strong>cursor: mutex S<\/strong> \u2192 Cursor mutex bekleme<\/li>\n\n\n\n<li><strong>cursor: mutex X<\/strong> \u2192 Cursor exclusive mutex<\/li>\n\n\n\n<li><strong>parse time cpu<\/strong> \u2192 Parse CPU yo\u011fun<\/li>\n\n\n\n<li><strong>hard parse elapsed time<\/strong> \u2192 Hard parse s\u00fcresi<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u2699\ufe0f Configuration \/ Memory<\/h2>\n\n\n\n<ol start=\"30\" class=\"wp-block-list\">\n<li><strong>free buffer waits<\/strong> \u2192 Bo\u015f buffer yok<\/li>\n\n\n\n<li><strong>checkpoint completed<\/strong> \u2192 Checkpoint bitmi\u015f bekleniyor<\/li>\n\n\n\n<li><strong>write complete waits<\/strong> \u2192 Yazma tamamlanmam\u0131\u015f<\/li>\n\n\n\n<li><strong>db file parallel write<\/strong> \u2192 DB writer yaz\u0131yor<\/li>\n\n\n\n<li><strong>DB CPU<\/strong> \u2192 CPU t\u00fcketimi (wait de\u011fil ama \u00f6nemli)<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udf10 Network<\/h2>\n\n\n\n<ol start=\"35\" class=\"wp-block-list\">\n<li><strong>SQL*Net message from client<\/strong> \u2192 Client bekleniyor (idle)<\/li>\n\n\n\n<li><strong>SQL*Net message to client<\/strong> \u2192 Client\u2019a veri g\u00f6nderiliyor<\/li>\n\n\n\n<li><strong>SQL*Net more data from client<\/strong> \u2192 B\u00fcy\u00fck veri geliyor<\/li>\n\n\n\n<li><strong>SQL*Net more data to client<\/strong> \u2192 B\u00fcy\u00fck veri gidiyor<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udcca Application<\/h2>\n\n\n\n<ol start=\"39\" class=\"wp-block-list\">\n<li><strong>enq: TX &#8211; index contention<\/strong> \u2192 Index blok contention<\/li>\n\n\n\n<li><strong>row cache lock<\/strong> \u2192 Data dictionary lock<\/li>\n\n\n\n<li><strong>row cache mutex<\/strong> \u2192 Dictionary mutex bekleme<\/li>\n\n\n\n<li><strong>resmgr: cpu quantum<\/strong> \u2192 Resource Manager CPU limiti<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\uddee Temp \/ Sort<\/h2>\n\n\n\n<ol start=\"43\" class=\"wp-block-list\">\n<li><strong>sort segment request<\/strong> \u2192 Temp alan allocation<\/li>\n\n\n\n<li><strong>direct path write temp<\/strong> \u2192 Temp\u2019e yazma<\/li>\n\n\n\n<li><strong>direct path read temp<\/strong> \u2192 Temp\u2019ten okuma<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u26a1 RAC (Cluster ortam\u0131)<\/h2>\n\n\n\n<ol start=\"46\" class=\"wp-block-list\">\n<li><strong>gc cr request<\/strong> \u2192 RAC consistent read iste\u011fi<\/li>\n\n\n\n<li><strong>gc current request<\/strong> \u2192 RAC current block iste\u011fi<\/li>\n\n\n\n<li><strong>gc cr grant 2-way<\/strong> \u2192 RAC block transfer<\/li>\n\n\n\n<li><strong>gc current grant 2-way<\/strong> \u2192 RAC current transfer<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\ude34 Idle (Genelde sorun de\u011fil)<\/h2>\n\n\n\n<ol start=\"50\" class=\"wp-block-list\">\n<li><strong>rdbms ipc message<\/strong> \u2192 Background process bekliyor<\/li>\n<\/ol>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udcc0 I\/O (Disk) Event\u2019leri \ud83d\udcbe Commit \/ Redo \ud83d\udd12 Concurrency (Lock &amp; Latch) \ud83e\udde0 Library Cache \/ Parse \u2699\ufe0f Configuration \/ Memory \ud83c\udf10 Network \ud83d\udcca Application \ud83e\uddee Temp \/ Sort \u26a1 RAC (Cluster ortam\u0131) \ud83d\ude34 Idle (Genelde sorun de\u011fil)<\/p>\n","protected":false},"author":1,"featured_media":55,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[161],"tags":[],"class_list":["post-855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-useful-queries"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ORACLE 19c \u2013 En \u00d6nemli 50 Wait Event<\/title>\n<meta name=\"description\" content=\"\ud83d\udcc0 I\/O (Disk) Event\u2019leri db file sequential read \u2192 Tek blok okuma (index access) db file scattered read 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