More Related Content More from Koji Shinkubo (11) Jpoug presents なーんでだ2 db tech showcase 2015 tokyo18. 普通の場合
何かがおかしい場合
WAIT #140537630453352: nam='db file sequential read' ela= 2167 file#=10 block#=92
WAIT #139710261849704: nam='db file sequential read' ela= 283 file#=3 block#=9682
WAIT #139710261849704: nam='db file sequential read' ela= 271 file#=3 block#=9681
WAIT #139710261849704: nam='db file sequential read' ela= 272 file#=3 block#=9680
WAIT #139710261849704: nam='db file sequential read' ela= 258 file#=3 block#=163
WAIT #139710261849704: nam='db file sequential read' ela= 260 file#=3 block#=162
...
19. db file sequential readで待機している対象のセグメントを特定
select segment_name
from dba_extents
where file_id = :file#
and :block# between block_id and block_id + blocks 1
and rownum = 1
20. db file sequential readで待機している対象セグメント
状況 対象ブロック 待機の対象オブジェクト
普通の場合 file#=10,
block#=nnn
TAB_01
何かがおか
しい場合
file#=3 ,
block#=nnn
_SYSSMU3_4004931649$