{"id":110,"date":"2009-08-03T08:43:00","date_gmt":"2009-08-03T06:43:00","guid":{"rendered":"http:\/\/antynet.pl\/index.php\/2009\/08\/03\/oracle-waits\/"},"modified":"2010-08-24T22:39:00","modified_gmt":"2010-08-24T20:39:00","slug":"oracle-waits","status":"publish","type":"post","link":"https:\/\/www.antynet.pl\/index.php\/2009\/08\/03\/oracle-waits\/","title":{"rendered":"ORACLE WAITS"},"content":{"rendered":"<p><span style=\"font-style: italic;\">TIME_STATISTICS = true<\/span><\/p>\n<p><span style=\"font-weight: bold;\">v$event_name<\/span> #describe events with parameters P and share to 12 wait_class<\/p>\n<p><span style=\"font-weight: bold;\">v$system_event<\/span> #based on events which was collected when instance was started for all sessions (please check TIME_WAITED regard to&nbsp; STARTUP_TIME.v$instance)<\/p>\n<ul>\n<li>TOTAL_WAITS #how many times session was waiting on this event<\/li>\n<li>TOTAL_TIMEOUTS #how often default time was reached, default time is set for each event<\/li>\n<li>TIME_WAITED # time used by event (1\/100 sek)<\/li>\n<li>TIME_WAITED_MICRO #as above (\/1000000 sek)<\/li>\n<li>AVERAGE_WAIT #average time TIME_WAITED\/TOTAL_WAITS (1\/100 sek)<\/li>\n<\/ul>\n<p><span style=\"font-weight: bold;\">v$session_event<\/span> #the same as v$system_event but for session, added SID column<\/p>\n<p><span style=\"font-weight: bold;\">v$session_wait<\/span> #present events which was expected by session<\/p>\n<ul>\n<li>SEQ #internal seqence nr for any event, it is increased any time when session wait at event<\/li>\n<li>STATE #value WAITING and WAITED UNKNOWN TIME show that TIMES_STATISTICS is FALSE<\/li>\n<li>SECONDS_IN_WAIT #time spending by session<\/li>\n<\/ul>\n<p><span style=\"font-style: italic;\">from 10g<\/span><br \/><span style=\"font-weight: bold;\">v$session_wait_history<\/span> #the same as v$session_wait but there is last 10 wait events for any session but col SEQ# means something diferent<br \/><span style=\"font-weight: bold;\">v$active_session_history<\/span> #last 30 min probes which was collected every 1 sec., more probes than at v$session_wait_history<\/p>\n<p><span style=\"font-weight: bold;\">v$system_wait_class<\/span> #waits grouped by class category <br \/><span style=\"font-weight: bold;\">v$session_wait_class<\/span> #waits grouped by class and session category<br \/><span style=\"font-weight: bold;\"><\/span><br \/><span style=\"font-weight: bold;\">v$event_histogram<\/span> #share between events which spend less than 1,2,4,8,16 ms<\/p>\n","protected":false},"excerpt":{"rendered":"<p>TIME_STATISTICS = true v$event_name #describe events with parameters P and share to 12 wait_class v$system_event #based on events which was collected when instance was started for all sessions (please check TIME_WAITED regard to&nbsp; STARTUP_TIME.v$instance) TOTAL_WAITS #how many times session was waiting on this event TOTAL_TIMEOUTS #how often default time was reached, default time is set [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[80],"tags":[27],"class_list":["post-110","post","type-post","status-publish","format-standard","hentry","category-oracle","tag-oracle-waits"],"_links":{"self":[{"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/posts\/110","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/comments?post=110"}],"version-history":[{"count":1,"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/posts\/110\/revisions"}],"predecessor-version":[{"id":184,"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/posts\/110\/revisions\/184"}],"wp:attachment":[{"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/media?parent=110"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/categories?post=110"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.antynet.pl\/index.php\/wp-json\/wp\/v2\/tags?post=110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}