** Changed in: dhis2
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1490174
Title:
Deleting Data Elements in UI very slow / hanging
Status in DHIS:
Incomplete
Bug description:
I have observed this behaviour multiple times now (2.18 and 2.19:
When deleting data elements from the data element list, the process is
unreasonably slow (2-8 minutes) on a relatively slow connection (in
this case I'm using a basic 1mbits connection in Norway running into a
Cape Town server) AND in most cases the "progress bar message"
DELETING..... is never replaced by the "Object deleted" message.
When deleting similar data elements from a local instance, it takes
around 15 seconds. This is also relatively slow, in particular since
the most demanding lookup into the datavalue table only takes around 1
second running as a separate pgSQL query - which leads me to suspect
that there is some inefficient code (nested query or similar) in the
delete DE sequence.
With a slow connection, it seems like the DE delete sequence takes so
long that some kind of time-out takes place.
In some cases, refreshing the browser page will show that the deleted
DE is gone - in other cases the browser (cache) still shows the DE is
there, whereas checking the server instance via pgremote shows the DE
has indeed been deleted. If the refresh button is hit too early - let
us say within 1-2 minutes - there's no change in the database.
Note that I have only observed this low performance / tendency to
"hang" when deleting Data Elements - all other deletions seems to be
quick.
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