This is offtopic for this list, but I will try to help you. If I am unsuccessful, you should raise the issue on the solr-users mailing list.
Thanks so much. Greatly appreciated.
How much of the total server memory of 4GB did you give to Solr for its heap? Is there other software running on that server besides Solr?
I'm not sure and didn't know I could assign memory to solr. This is the first time I've used solr; I'm totally inexperienced with it. I've attached a screenshot that hopefully helps answer your question.
This machine is dedicated to solr and runs no other software as a daemon not related to the OS.
What's the total size of all the Solr indexes on the Solr server?
du -shc on /var/solr/data reports 781 M of total data.
du -sch on the core I'm using is only 116 M. As of now, I have 15K documents with about 2K deleted in the core.
Can you get the screenshot mentioned at the following URL, put it on a file-sharing site, and give me the URL?
https://cwiki.apache.org/confluence/display/SOLR/SolrPerformanceProblems#Sol...
Attached.
(disclaimer: I wrote that Solr wiki page)
You should read the entire page, the link above is to the section describing useful screenshots)
OK, I will.
General note: A Solr search that takes 3 seconds (let alone 15) would have me concerned. If the system is sized appropriately, I would expect a search even on a massive index to complete in less than a second.
I happen to be using Solr for dovecot myself. If I search my index for "the" which is very common in English text, the query takes 19 milliseconds, and that is searching on five fields, as well as doing a facet on the user field. My Solr index has 150048 messages (122K of those are in my personal mailbox) and takes up 628 megabytes of disk space. The total size of the email that is indexed is 7 gigabytes.
Interesting and good to know.
|<str name="parsedquery_toString">+(cc:the | from:the | to:the | body:the | subject:the)</str> |
My index is using the stopword filter but the list of stopwords is empty.
The following response may interest you:
This is a search for "a" which I had run several times, so Solr was serving it from its cache, and this time it only took 6 milliseconds. It also shows what a facet can do. The longest time I got for the "a" search was 15 milliseconds, before the query was in the cache.
I think they queries themselves are returning very quickly, at least they were when I did a query on a single inbox. That's why I'm wondering if doing a search across 40 different inboxes via roundcube might be the issue. I'm thinking that each time a new mailbox is selected, it slows things down. But I have no idea how the IMAP search is performed across multiple inboxes so that's just a wild guess.
