EXEM

oracle mysql exem odi oracle deep internal postgresql page dump postgres block cleanout performance degradation undo aurora amazon web services amazon internal max_cr_dba max_length undo page page delayed block cleanout pg9.4 t_xmin pgday pg full vacuum frozenbit mvcc ingres xmin ctid xmax infomask cmin clog freeze t_xmax infomask2 p_s wait event performance schema benchmark database pdi undo record chaining update statement monitoring server monitoring rollback segment parameter roll pointer lock autovacuum xid wraparound hint vacuum statistic vm fsm dump performance tuning sqlid sql address v$session sql library cache 엑셈 성능저하 오라클 블록 클린아웃 max length db block max cr dba undo record update