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5250 discussions

FW: How do I increase Java's heap size with the flag -Xmx<size>?
by DAIANE ROBERTA CANDIDA 31 Jan '14

31 Jan '14

Hello Dirk, You were right about the command used to increase Java's heap size, but my loading files don't work yet. The server has memory 988g When I put 500g in the option -Xmx it raised the error below: Error occurred during initialization of VM Unable to allocate bit map for parallel garbage collection for the requested heap size. Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit. So I decreased it from 500 to 350 then the following error appears Out of Main Memory. You can try to: - increase Java's heap size with the flag -Xmx<size> - deactivate the text and attribute indexes. I already deactivated the indexes FTINDEX: OFF TEXTINDEX: OFF ATTRINDEX: OFF What should I do to import data into the basex? Regards, Daiane.

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Use of attribute index
by Robert schlichtner 31 Jan '14

31 Jan '14

Hello, I found that a number of similar queries have quite different performance: xquery doc('mcev_temp_5/20140130_11_55_40.xml')//column[@name='KLV_m1_rdr']/v takes only 0.68ms, which is great. But xquery doc('mcev_temp_5/20140130_11_55_40.xml')//column[@name='KLV_m1_rdr']/v[1] takes 1479.81ms. If I change this to the equivalent (for my data) xquery (doc('mcev_temp_5/20140130_11_55_40.xml')//column[@name='KLV_m1_rdr'])/v[1] it runs fast again (0.53ms) Checking the query execution plan I found that only query 1 and 3 utilize the attribute index. I find this rather surprising, and I would like to ask if there is some general reason/rule why the second can not use the index, so I can avoid such 'bad' queries in the future. Thanks! (I am using BaseX 7.7.2 on Windows XP.) Regards, Robert

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html and css
by Lars Johnsen 30 Jan '14

30 Jan '14

When running BaseX http-server, I wondered where resources like javascript and css should be located. The .xqm-file for the welcome RESTXQ module seems to fetch its svg and css from a static directory under webapp. However, when sending HTML code from within a home made query, it won't connect to any css neither within webapp nor webapp/static, nor even with an absolute path. Best Lars G Johnsen National Library of Norway

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Parameter to xquery
by Lars Johnsen 30 Jan '14

30 Jan '14

Is it possible to pass parameters to xquery modules using BaseX scripting language? I tried something similar to to http-specification but had no luck. For example, if the code below is stored as add.xq, could $x and $y be supplied in a RUN add.xq command? declare variable $x external; declare variable $y external; let $res := $x + $y return $res All the best Lars G Johnsen National Library of Norway

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How do you update Basex to 7.7.2 version?
by DAIANE ROBERTA CANDIDA 30 Jan '14

30 Jan '14

Hello, I have the Basex installed on the Ubunto Server and by the command apt-get install basex I can not update it because it is past of date, then I downloaded the basex_7.7.2-1.debian.tar.gz but I don't know how to execute the installation. Could you give me a tutorial to do the installation for updating of the basex? Regards, Daiane

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Load lots xml but Unknown option 'ADDCACHE'
by DAIANE ROBERTA CANDIDA 29 Jan '14

29 Jan '14

Hello, I am trying to load a big xml dataset into the Basex but I am in trouble because it is taking so much time and then the message below is returned: Out of Main Memory. The following hints might help you: - increase Java's heap size with the flag -Xmx<size> - choose the internal XML parser in the GUI or via 'set intparse on' - deactivate the text and attribute indexes So I read the help topic in the web site http://comments.gmane.org/gmane.text.xml.basex.talk/2540 I realized that I didn't have set ADDCACHE ON. After that I wrote the following command lines on the linux OS: BaseX 7.0.2 [Client] Try "help" to get more information. > CREATE DB bd_inex2009 Database 'bd_inex2009' created in 66.81 ms. > SET AUTOFLUSH false AUTOFLUSH: OFF > SET ADDCACHE true Unknown option 'ADDCACHE'. > SET INTPARSE true INTPARSE: ON > SET DTD false DTD: OFF > ADD /home/arwen/daiane_oracle/loading_inex2009/new_page_xml2 Out of Main Memory. The problema persist yet. Finaly I downloaded the latest Basex release for Ubunto by the link https://launchpad.net/ubuntu/+source/basex/7.7.2-1 I don't know how to install the basex_7.7.2-1.debian.tar.gz on the server. Could you give me some help? I really need to load this database with those xml to complete a academic task. Regards Daiane

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How to get file name + line number in query results
by Moshe Zuisman 29 Jan '14

29 Jan '14

Hi. I am using base-X as kind of repository for my XML files, to perform queries over all files I use. Number and size of files are not a problem - it is some 100+ files , each one few hundreds lines. To be more specific - those are xml files of IzPack installation. I have loaded all my files into database and perform different kinds of queries there. It works great. Problem is - that after I have found desired data, I have to look at which file at which place it really is located. What I am doing now is - just copy into clipboard piece of resulting data and performing "search in files" at all my XML files directory. Finally - it works, but I am sure - there have to be better way to do it... Can I somehow modify my query to cause base-X to "say" me - where calculated result is located at original file system?

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Pearl pigments
by tony.zhao＠vip.188.com 29 Jan '14

29 Jan '14

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os x app broken
by Charles Dietrich 27 Jan '14

27 Jan '14

When I attempt to open the unzipped BaseX.app (version 7.7.2), OS X reports that it is damaged. -- Charles

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duplicate xmlns in wadl o/p
by Andy Bunce 27 Jan '14

27 Jan '14

given a function commented like: (:~ : return search results : <hit> : <entity>country</entity> : <name>name</name> : <url>...</url> : </hit> :) declare %rest:GET %rest:path("where4/api/search") %restxq:query-param("q", "{$q}") %output:method("json") function search($q){ The wadl function [1] produces: <wadl:resource path="/where4/api/search/"> <wadl:method name="GET"> <wadl:doc xmlns="http://www.w3.org/1999/xhtml">return search results <hit xmlns="" xmlns="http://www.w3.org/1999/xhtml"> <entity xmlns="">country</entity> <name xmlns="">name</name> <url xmlns="">...</url> </hit> </wadl:doc> <wadl:request> <wadl:param name="q" style="query"/> </wadl:request> <wadl:response> <wadl:representation mediaType="application/json"/> </wadl:response> </wadl:method> </wadl:resource> Regards /Andy [1] http://docs.basex.org/wiki/RESTXQ_Module#rest:wadl

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