Generally that would be a statement that didn't complete by the time the ending snapshot was taken. Like so: Elapsed CPU Elap per % Total Time (s) Time (s) Executions Exec (s) DB Time SQL Id ---------- ---------- ------------ ---------- ------- ------------- 257 163 0 N/A 82.8 gf5nnx0pyfqq2 Module: SQL*Plus select a.col2, sum(a.col1) from kso.skew a, kso.skew b group by a.col2 That statement was still running when that ending snapshot was taken. Also notice that the elapsed time per exec is rounded to the nearest tenth of a second. So if it says 0.0 that means that the statement averaged less than 0.05 seconds. Kerry Osborne Enkitec blog: kerryosborne.oracle-guy.com On May 9, 2011, at 7:21 PM, ed lewis wrote: > > Hi, > I'm trying to understand some of the information in > an AWR report. > > Specifically, > > - The "executions" column and "Elap per exec" , in several cases is empty, > but shows "DB time", "Elapsed TIme", and "CPU time". > Can anyone explain that ? > > - 1 transactions shows 5.509,111 executions but > no "elap per exec". > > These numbers are from 9 hours of snapshots. > > Solaris 10, RDBMS, and RAC 10.2.0.4. > > Your comments are appreciated. > > thanks > > ed > > > Resources reported for PL/SQL code includes the resources used by all SQL > statements called by the code. > % Total DB Time is the Elapsed Time of the SQL statement divided into the > Total Database Time multiplied by 100 > Elapsed Time (s) CPU Time (s) Executions Elap per Exec (s) > % Total DB Time SQL Id SQL Module SQL Text > 16,520 16,518 19,286 0.86 4.03 d4fdhcjs2vndp SELECT > C603210194 FROM T2245 W... > 12,041 12,023 2.94 3ycgb4yb5svuc SELECT > T954.C1, C1000000161 FR... > 11,554 11,528 2.82 00yn69r0dguk6 SELECT > T954.C1, C1000000161 FR... > 11,441 9,214 19,384 0.59 2.79 41cnaprwx32n6 SELECT > cdintegrationid FROM bm... > 11,356 11,337 2.77 gvtgqv0gqx6nn SELECT > T954.C1, C1000000161 FR... > 7,877 7,875 1.92 fyb6g4640yaag SELECT T954.C1, > C1000000161 FR... > 7,465 1 5 1492.91 1.82 cmdx8dhbwnncy DELETE FROM > T129 WHERE C1 = :"... > 6,731 6,728 1.64 0pks9t80ukx0s SELECT T936.C1 > FROM T936 WHERE... > 5,947 2,982 1,308 4.55 1.45 4rkq5f7cx0aau SELECT T1346.C1 > FROM T1346 WHE... > 5,134 5,122 134 38.31 1.25 9g2vbj6d66ssr SELECT T954.C1, > C1000000161, C... > 4,990 4,843 5,509,111 0.00 1.22 9dqj7wx3yc9yq SELECT > fieldId, vuiId, propSho... > 4,807 4,807 32 150.23 1.17 0xjy5qb0z6s1w SELECT T727.C1, > C10000001, C30...