What are the responsibilities of a DBA and what are the KPIs (performance indicators)?

Question

SQL

1. What are the duties of a DBA?
2. What are the key performance indicators (KPI) - in other words, "how to determine whether the database administrator is working well or freebies?" Maybe he is simply unnecessary in the organization, or maybe he deserves a bonus! :)
The question is big - maybe someone will write an article or a review :)
I searched in the internet - but I found only humor
For example:
www.rabotagrad.ru/information/164/262

2. A person with a higher mathematical, economic or technical education and at least 3 years of experience in working on personal computers is appointed to the position of a database administrator .
4. The database administrator must know:
4.5. Methods of classification and coding of information.
4.6. Normalized programming languages.
4.7. Current standards, number systems, ciphers and codes.
4.9. The procedure for issuing technical documentation.
4.10. Advanced domestic and foreign experience in programming and use of computer technology.
4.11. Fundamentals of economics, organization of labor and management.

Or here is an example of a vacancy:
www.superjob.ru/vakansii/administrator-bd-27957061.html

Job Responsibilities:
Work with invoices.
Maintaining a database.
Merchandising.

or even worse - Standard order
www.aup.ru/docs/di/809.htm

2.1. Analyzes the information needs of structural
divisions of the enterprise.
2.7. Carries out systematic training of employees of the enterprise in the
techniques and skills of working on computers, as well as working with the implemented
software.
2.8. Monitors the operation of computers and promptly
reports failures and malfunctions to the informatization department.
2.9. Carries out accounting and storage of documents related to
automated processing of information on computers.
2.11. Monitors the integrity, reliability and
safety of data circulating in the automated information system .
2.12. Maintains an archive of used software and
reference information.
2.13. Issues recommendations to the management of the enterprise on the distribution
of incoming computer equipment between structural divisions,
taking into account the availability of software, trained specialists and
analysis of the load of PCs in operation.

One can only laugh at google answers with search - "Duty of a database administrator".....
Thank you :)

Answer 1

IMHO, a novice administrator must be able to install a DBMS, create a database, manage accounts, manage backup / restore procedures. This is the minimum minimorum.
medium - to understand the tuning of the DBMS, to have a good idea of ​​​​the correct architecture of the database, to understand the automation of all kinds of jobs to optimize the structure of the database. in relation to MSSQL, it would be nice to know what SSIS / SSRS is - not exactly DBA tasks, but useful tools.
well, hi - xs, I'm not mature enough yet.
KPI for DBA - I would tie it to SLA. The SLA level is fulfilled - well. I was able to optimize something, get a performance increase, automate some process, which provided the best SLA - I overfulfilled the plan.