Changes between Version 1 and Version 2 of ProcessingTimesOct2010

Timestamp:

Nov 4, 2010, 11:54:08 AM (16 years ago)

Author:

heather

Comment:

--

ProcessingTimesOct2010

@@ -1 +1 @@
 I have been investigating the dtime_% fields in the diff and chip stages for gpc1 for the month of October (and also September, see [wiki:ProcessingTimesSept2010]).  The tag changed on 2010-10-29, which included a number of changes to the diff stage.
 
+== Diff Stage ==
+
+There are 4 dtime columns for diff: dtime_match, dtime_script, dtime_phot and dtime_diff.  dtime_diff is never set (it is always NULL).  dtime_match and dtime_phot often have nulls (about 7% of the time). I excluded from my plots diff_ids with NULL values in any of the dtime columns (except for dtime_diff).  For the 'old tag', I selected dates between 2010-09-28 and 2010-10-25, and for the 'new tag', I selected dates between 2010-10-29 and 2010-11-03.  
+
+ * new tag = dotted lines
+ * old tag = solid lines
+
+ * Purple = dtime_script
+ * Green = dtime_phot
+ * Black = dtime_match
+
+[[Image(diff_dtime-10.png)]]
+
+And here are the median times for each:
+
+||dtime || old tag(s) || new tag(s)|| (old tag - new tag)(s) ||
+||dtime_match || 54.4 || 40.4 || 14.0 ||
+||dtime_phot || 70.0 || 59.0 || 11.0 ||
+||dtime_script || 151.0 || 125.0 || 26.0 ||
+