[O11y][PostgreSQL] Lens migration for Database Overview visualizations to Kibana version 8.4.0

[rajvi-patel-22]

• Enhancement

What does this PR do?

• Migrate visualizations to lens for PostgreSQL integration package

• Statistics for PostgreSQL Lens migration:

PostgreSQL Dashboards	Before Migration		After Migration
	Lens	Visualization	Lens	Visualization	New control panel
[Metrics PostgreSQL] Database Overview	0	10	9	0	1
	0	10	9	0	1

Note: One visualization is migrated to new input controls.

Checklist

• I have added an entry to my package's changelog.yml file.
• I have verified that panels are populated with data.
• I have verified that panels are not distorted after being migrated to lens.
• I have updated screenshots of dashboard.
• I have verified that data count are matching and panel aggregations are same as before.

Author's Checklist

• Migrated panels should be removed from visualization folder.
• Migrated visualizations are populating in current Kibana version 8.4.0 itself.

Related issues

• Relates Lens Migration of OBS integrations #5221

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• Start Time: 2023-04-06T15:40:40.165+0000

• Duration: 17 min 54 sec

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Failed	0
Passed	44
Skipped	0
Total	44

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (1/1)	💚
Files	100.0% (4/4)	💚
Classes	100.0% (4/4)	💚
Methods	93.333% (28/30)	👍 60.0
Lines	97.041% (164/169)	👎 -2.959
Conditionals	100.0% (0/0)	💚

[kush-elastic]

LGTM!

[agithomas]

Can you please update the Y-axis unit for these two panels ? it is not clear - if the Y axis shows count or a percentage?

[rajvi-patel-22]

Can you please update the Y-axis unit for these two panels ? it is not clear - if the Y axis shows count or a percentage?

@agithomas, Please find below aggregation which is applied to the Shared block cache stats panel. We are not sure which unit should we put here. Can you please help us with this? Same functions are also used in the Local block cache stat panel.

[agithomas]

Can you please update the Y-axis unit for these two panels ? it is not clear - if the Y axis shows count or a percentage?

@agithomas, Please find below aggregation which is applied to the Shared block cache stats panel. We are not sure which unit should we put here. Can you please help us with this? Same functions are also used in the Local block cache stat panel.

Count can be considered here.

[rajvi-patel-22]

Can you please update the Y-axis unit for these two panels ? it is not clear - if the Y axis shows count or a percentage?

@agithomas, I have updated the PR as per your suggestion and added Y-axis label to the Local and shared block cache stats panels.

[agithomas]

LGTM!

[elasticmachine]

Package postgresql - 1.12.0 containing this change is available at https://epr.elastic.co/search?package=postgresql