отображать информацию о таймсериях показателей производительности (display information about performance metric timeseries)
METADATA QUALIFIERS AND METADATA OPERATORS
Metadata qualifiers are enclosed by ``curly'' braces ({}), and
further restrict the query results to timeseries operands with
various metadata properties. These qualifiers are based on
metric or instance names, and metric label values, and take the
general form metadata.name OPERATOR value, such as:
instance.name == "cpu0"
metric.name != "kernel.all.pswitch"
When using label names, the metadata qualifier is optional and
can be dropped, such as:
label.hostname == "www.acme.com"
hostname == "www.acme.com"
For metric and instance names only the string operators apply,
but for metric label values all operators are available. The set
of available operators is:
Boolean operators
All string (label, metrics and instances) and numeric (label)
values can be tested for equality ("==") or inequality ("!=").
String operators
Strings can be subject to pattern matching in the form of glob
matching ("~~"), regular expression matching ("=~"), and regular
expression non-matching ("!~"). The ":" operator is equivalent
to "~~" - i.e., glob matching.
Relational operators (numeric label values only)
Numeric label values can be subject to the less than ("<"),
greater than (">"), less than or equal ("<="), greater than or
equal (">="), equal ("==") and not equal ("!=") operators.
Logical operators
Multiple metadata qualifiers can be combined with the logical
operators for AND ("&&") and OR ("||") as in many programming
languages. The comma (",") character is equivalent to logical
AND ("&&").
