No. We are using Postgres 9.5.x
El 02/12/16 a les 12:37, Adan ha escrit:
Joan,
are you using oracle? there is some index issues in dspace 6.0
regards
Adán Román Ruiz
ARVO Consultores
We are experiencing the something similar but in all our repository
(except the home page), almost all pages in DSpace 6x takes between
6s to 60seconds, we have tried to increase the memory of the tomcat,
changed the SO (Centos7 to Ubuntu), upgrading tomcat (8.0.5 to 8.5),
giving more cpus, changing data to ssd hard drive... all without a
signigicant improvements of performance.
Our configs are:
Vcpus : 8 (GenuineIntel 2099.998MHz)
Tomcat (8.5.8) config: -Xmx4072M -Xms512M -XX:PermSize=256M
-XX:MaxPermSize=512m
Items: arroung 120k
Now we have in production DSpace 3_x and this situation is preventing
us from upgrading also.
Bests
Joan
El 01/12/16 a les 22:15, wltant...@gmail.com ha escrit:
In DSpace 6x, it takes an intolerable 10 minutes (!!!) to populate
the Select Collection drop-down in my instance when logging in as a
regular user as opposed to an administrator.
I can add hardware details if anybody is interested, but I'm pretty
sure it's not the problem -- this is a beefy machine that hummed
along nicely with version 5.x...
We have a little over 1000 collections in our repository, and we use
shibboleth for authentication so findAuthorizedPerformanceOptimize
is set to it's default of false.
Some rudimentary profiling suggests that the isAdmin() call in
authorize() is the bottleneck. In a recent test (pretty typical),
the findAuthorized() function takes 704,040 ms to return. The time
spent in the isAdmin() call amounts to 590,691 ms, or about 83% of
the time. Another bottleneck within this bottleneck is the
recursive call to isAdmin(parent collection) -- about 400,000 ms.
Clearly there is a lot of waste in this call because many many
collections will be tested over and over. In our case, we have a
single community that is the ancestor of every community/collection,
and isAdmin() winds up being called against it 1012 times -- same as
the number of collections in the repository -- and 1011 of them are
redundant.
As a further test, I have short-circuited isAdmin() to return false
immediately. The results in the rendering of the drop-down in about
94,000 msec. Still way too long, but a drastic improvement.
When logging in as an administrator, isAdmin() returns rather
quickly and the list is populated much quicker as well. But for the
everyday user, the performance is a big red light preventing us from
upgrading.
Sorry, this is simply stating the problem with no solution. But has
anybody else with a similarly sized repository experienced this slow
down?
Regards,
Bill
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