SUNScholar/Optimisations/Logs

Tomcat Java web applications

Changed all instances of "INFO" to "ERROR" in the following config file to reduce disk I/O and CPU load.

nano /home/dspace/config/log4j.properties

Then copied the file to dspace-src config folder.

SOLR

Log level

Please note: The procedure below is not stable, so I installed PSI Probe using the Tomcat manager web interface and now I set the SOLR log level via the web gui after each re-build. See: https://code.google.com/p/psi-probe

See: http://lucidworks.lucidimagination.com/display/solr/Configuring+Logging and https://jira.duraspace.org/browse/DS-1460

Create the following file:

nano /home/dspace/dspace-1.8.2-src-release/dspace/modules/solr/src/main/webapp/WEB-INF/classes/logging.properties

Add the following to the file:

 org.apache.commons.digester.Digester.level = WARNING
 org.apache.solr.level = SEVERE

---

NANO Editor Help

CTL+O	= Save the file and then press Enter
CTL+X	= Exit "nano"
CTL+K	= Delete line
CTL+U	= Undelete line
CTL+W	= Search for %%string%%
CTL+\	= Search for %%string%% and replace with $$string$$
CTL+C	= Show line numbers

More info = http://en.wikipedia.org/wiki/Nano_(text_editor)

---

Save the file and rebuild.

Log file permissions

I setup a root cron crontab as follows.

sudo -i

mkdir /root/scripts

nano /root/scripts/fix-log-perms

Copy and paste the following.

#!/bin/bash

chmod 0777 -R /home/dspace/logs

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