Oleg Zaytsev cd1f8ac129
MemPostings: keep a map of label values slices (#15426)
While investigating lock contention on `MemPostings`, we saw that lots
of locking is happening in `LabelValues` and
`PostingsForLabelsMatching`, both copying the label values slices while
holding the mutex.

This adds an extra map that holds an append-only label values slice for
each one of the label names. Since the slice is append-only, it can be
copied without holding the mutex.

Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>
2024-11-29 12:52:56 +01:00
..
2024-11-26 17:21:55 +00:00