# Information Schema

The `information_schema` is a standard-compliant database available in every MariaDB instance, providing metadata about all other databases, tables, columns, and server-level objects.

{% columns %}
{% column %}
{% content-ref url="information-schema/information-schema-tables" %}
[information-schema-tables](https://mariadb.com/docs/server/reference/system-tables/information-schema/information-schema-tables)
{% endcontent-ref %}
{% endcolumn %}

{% column %}
Provides a comprehensive list of all tables available within the `information_schema`, including their purpose and the metadata they provide.
{% endcolumn %}
{% endcolumns %}

{% columns %}
{% column %}
{% content-ref url="information-schema/time\_ms-column-in-information\_schemaprocesslist" %}
[time\_ms-column-in-information\_schemaprocesslist](https://mariadb.com/docs/server/reference/system-tables/information-schema/time_ms-column-in-information_schemaprocesslist)
{% endcontent-ref %}
{% endcolumn %}

{% column %}
Details the `TIME_MS` column in the `INFORMATION_SCHEMA.PROCESSLIST` table, which provides high-resolution timing for active server processes.
{% endcolumn %}
{% endcolumns %}