Add notes for 2024-09-23

content/posts/2024-09.md

@@ -96,4 +96,49 @@ Mozilla/5.0 (Windows; U; Windows NT 6.1; rv:11.0) Gecko/20100101 Firefox/11.0
 
 ![Solr with 4g heap](/cgspace-notes/2024/09/2024-09-16-Solr-4g-heap.png)
 
+## 2024-09-23
+
+- Upgrade PostgreSQL from version 14 to 15 on DSpace Test the same way I did last year:
+
+```console
+# apt update
+# apt install postgresql-15
+# Update configs with Ansible
+# systemctl stop tomcat9
+# pg_ctlcluster 14 main stop
+# tar -cvzpf var-lib-postgresql-14.tar.gz /var/lib/postgresql/14
+# tar -cvzpf etc-postgresql-14.tar.gz /etc/postgresql/14
+# pg_ctlcluster 15 main stop
+# pg_dropcluster 15 main
+# pg_upgradecluster 14 main
+# pg_ctlcluster 15 main start
+...
+
+ERROR:  could not find function "xml_is_well_formed" in file "/usr/lib/postgresql/15/lib/pgxml.so"
+ERROR:  function public.xml_is_well_formed(text) does not exist
+ERROR:  could not find function "xml_is_well_formed" in file "/usr/lib/postgresql/15/lib/pgxml.so"
+ERROR:  function public.xml_valid(text) does not exist
+```
+
+
+- After that I [re-indexed the database indexes](https://adamj.eu/tech/2021/04/13/reindexing-all-tables-after-upgrading-to-postgresql-13/) using a query:
+
+```console
+$ su - postgres
+$ cat /tmp/generate-reindex.sql
+SELECT 'REINDEX TABLE CONCURRENTLY ' || quote_ident(relname) || ' /*' || pg_size_pretty(pg_total_relation_size(C.oid)) || '*/;'
+FROM pg_class C
+LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace)
+WHERE nspname = 'public'
+  AND C.relkind = 'r'
+  AND nspname !~ '^pg_toast'
+ORDER BY pg_total_relation_size(C.oid) ASC;
+$ psql dspace < /tmp/generate-reindex.sql > /tmp/reindex.sql
+$ <trim the extra stuff from /tmp/reindex.sql>
+$ psql dspace < /tmp/reindex.sql
+```
+
+- The database shrunk by 186MB!
+
+
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