[ckan-dev] Bootup performance

[Alex Corbi]

Hi Everyone,

I have a performance question depending on amount of stored datasets and bootup times.

In the context of http://data.opendevelopmentmekong.net/, which is an instance based on CKAN v2.2.1 deployed through uwsgi on a server with 2core and 4GB of memory (using docker containers), currently with VERY low traffic and 13 datasets hosted. In this scneario, bootup times after restart of the docker container for CKAN are quick and does not present any issue.

However, the bootup time and derivated Issues increase considerably with the number of datasets. On the very same setup, but being populated with ~2000 datasets, the CKAN instance takes up to 20 minutes to boot and sometimes shows an erratic behaviour after rebooting ( Internal Server Errors, random URLs and resources not being loaded).

So, here my questions:
- Do the characteristics of the described system (number of datasets, traffic) comply with the "small to medium" instance type mentioned on https://github.com/ckan/ckan/wiki/Hardware-Requirements? Are 2 core/4GB mem ok?

- During the bootup process, activity on the CKAN and Postgresql side can be detected. both components take a big percentage of the CPU during the bootup (~20 minutes). What is supposed to be happening behind the scenes? Solr reindexing everytime CKAN restarts?

- Is there any possible action to be done in order to reduce the booting time of a restarted CKAN instance? (DB/Solr/ckan conf.)

Thanks in advance, any help is appreciated,

-- 
Alex Corbi
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