Hackathon | Noobaa PGDB integrity and stat check

[naveenpaul1]

Explain the changes

1. Integrity check for Noobaa PGDB​
   Verify Integrity of Noobaa md parts, chunks, fragments​
   Check only PGDB integrity, not the actual storage​
2. Noobaa PGDB stat check​
   Check CPU\time consuming queries and number of query count

Issues: Fixed #xxx / Gap #xxx

1. DB integrity related issues
2. Identify bottleneck Queries in PGDB

Testing Instructions:

1. nb diagnostics int-check --dump-data-map --namespace {namespace}​
   -- Return integrity issues count if any​
   -- dump-data-map flag dump data hierarchy map in JSON format
2. nb diagnostics db-stat-prepare --namespace {namespace}​
   -- Create extension pg_stat_statements and rest metrics​

doc : https://ibm.ent.box.com/file/1722250034383

• Doc added/updated
• Tests added

[nimrod-becker]

Feedback from the session:

1. add an ability to get a key name (or list of keys) to analyze
2. show only the problematic keys, if everything is ok, don't print