(this is in alpha work mode, draft from a previous PoC, but you can try and comments are welcome)

The goal is to see this without licensing Diagnostic Pack:

oracle-statspack-grafana

Using PostgreSQL Foreign Data Wrapper to read Oracle Statspack metrics from Grafana

Build the image for the PostgreSQL Oracle_FDW gateway

(cd oracle-perfstat-fdw && docker build -t oracle-perfstat-fdw .)

You may prefer not to expose the 5432 port as you can connect with docker exec -it psql oraperfstat oraperfstat

Note that you can also pull the image I've built:

docker pull docker.io/pachot/oracle-perfstat-fdw

Run the image for the PostgreSQL Oracle_FDW gateway

docker network create oracle-perfstat-fdw
docker run -p 5432:5432 --network oracle-perfstat-fdw -d -e POSTGRESQL_ADMIN_PASSWORD=franck --name oracle-perfstat-fdw oracle-perfstat-fdw

This creates a networ and container running the PostgreSQL database with Oracle Foreign Data Wrapper The postgresql password, and the oraperfstat one, are POSTGRESQL_ADMIN_PASSWORD (default: postgres)

The container runs PostgreSQL with Laurenz Albe's Oracle Foreign Data Wrapper (using Oracle instantClient) and provides a procedure to create Foreign Data Wrapper tables, here is an example:

docker exec oracle-perfstat-fdw psql -e oraperfstat oraperfstat <<'SQL'
select  oraperfstat$define_fdw('pdb1','//server:1521/PDB1','perfstat','password',true,true);
SQL

This creates the views to query Statspack on the database.

• 1st argument is the internal name.
• 2nd argument is the Oracle connection string
• 3rd argument is the user that has access to Statspack views (can be perfstat)
• 4th argument is the user password
• 5th argument default to false, drops the FDW server if set to true
• 6th argument defaults to true, creates the FDW server

Example with PMM and Oracle XE

run Percona Management Server

You can use this from Grafana, declaring a PostgreSQL source, preferably creating a user with the right privileges.

We need only Grafana but Percona Managment Server contains Grafana and other components to monitor databases, easy to install:

docker pull percona/pmm-server:2
docker create --volume /srv --name pmm-data percona/pmm-server:2 /bin/true
docker run --detach --restart always --publish 443:443 --network oracle-perfstat-fdw --volumes-from pmm-data --name pmm-server percona/pmm-server:2

Declare Data Source in Grafana

Then you can access Grafana on 443 port and declare a PostgreSQL source:

• Name: Oracle Perf Stat (which I set as default)
• Host: oracle-perfstat-fdw:5432
• Database: oraperfstat
• User:oraperfstat
• Password: POSTGRESQL_ADMIN_PASSWORD (as defined above)
• SSL Mode: disable

Note that if you run rootless (podman) and get Error: cannot join CNI networks if running rootless: invalid argument when starting containers with --network oracle-perfstat-fdw you can use the host name rather than the container name as the PostgreSQL host and the port you redirected with -p 5432:5432

Import dashboards

examples of dashboards are in the grafana subdir, you can import them

Create an Oracle XE database

and install Statspack

docker run -d -p 1521:1521 --network oracle-perfstat-fd -e ORACLE_PASSWORD=franck gvenzl/oracle-xe --name oraclexe
docker exec -t oraclexe <<'SQL'
sqlplus -L sys/oracle@//localhost/XE as sysdba @ ?/rdbms/admin/spcreate
perfstat
SYSAUX
TEMP
exec statspack.snap(i_snap_level=>7);
exec for i in 1..100 loop dbms_stats.gather_system_stats('NOWORKLOAD'); dbms_stats.gather_database_stats; statspack.snap(i_snap_level=>7); end loop;
quit
SQL

You should see something in Grafana...