2015-12-02 12:25:34 +01:00
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December, 2015 · CGSpace Notes
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< h1 class = "text-primary" > December, 2015< / h1 >
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Dec 2, 2015
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< h2 id = "2015-12-02:012a628feed6d64ae1151cbd6151ccd6" > 2015-12-02< / h2 >
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< li > Replace < code > lzop< / code > with < code > xz< / code > in log compression cron jobs on DSpace Test—it uses less space:< / li >
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< pre > < code > # cd /home/dspacetest.cgiar.org/log
# ls -lh dspace.log.2015-11-18*
-rw-rw-r-- 1 tomcat7 tomcat7 2.0M Nov 18 23:59 dspace.log.2015-11-18
-rw-rw-r-- 1 tomcat7 tomcat7 387K Nov 18 23:59 dspace.log.2015-11-18.lzo
-rw-rw-r-- 1 tomcat7 tomcat7 169K Nov 18 23:59 dspace.log.2015-11-18.xz
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< li > I had used lrzip once, but it needs more memory and is harder to use as it requires the lrztar wrapper< / li >
< li > Need to remember to go check if everything is ok in a few days and then change CGSpace< / li >
2015-12-02 18:16:44 +01:00
< li > CGSpace went down again (due to PostgreSQL idle connections of course)< / li >
< li > Current database settings for DSpace are < code > db.maxconnections = 30< / code > and < code > db.maxidle = 8< / code > , yet idle connections are exceeding this:< / li >
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< pre > < code > $ psql -c 'SELECT * from pg_stat_activity;' | grep cgspace | grep -c idle
39
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< li > I restarted PostgreSQL and Tomcat and it’ s back< / li >
< li > On a related note of why CGSpace is so slow, I decided to finally try the < code > pgtune< / code > script to tune the postgres settings:< / li >
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< pre > < code > # apt-get install pgtune
# pgtune -i /etc/postgresql/9.3/main/postgresql.conf -o postgresql.conf-pgtune
# mv /etc/postgresql/9.3/main/postgresql.conf /etc/postgresql/9.3/main/postgresql.conf.orig
# mv postgresql.conf-pgtune /etc/postgresql/9.3/main/postgresql.conf
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< li > It introduced the following new settings:< / li >
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< pre > < code > default_statistics_target = 50
maintenance_work_mem = 480MB
constraint_exclusion = on
checkpoint_completion_target = 0.9
effective_cache_size = 5632MB
work_mem = 48MB
wal_buffers = 8MB
checkpoint_segments = 16
shared_buffers = 1920MB
max_connections = 80
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< li > Now I need to go read PostgreSQL docs about these options, and watch memory settings in munin etc< / li >
2015-12-02 12:25:34 +01:00
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< h1 class = "author-name text-primary" > Alan Orth< / h1 >
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