rust/neon
1
0
Fork 0
mirror of https://github.com/neondatabase/neon.git synced 2026-01-08 05:52:55 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add Gauge for # of layers

Browse Source 
Seems like a useful metric
This commit is contained in:
Heikki Linnakangas
2021-08-30 12:58:15 +03:00
parent 263e03f4b8
commit 9dfee8a3b5
1 changed files with 16 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
pageserver/src/layered_repository/layer_map.rs
View File

@@ -13,14 +13,25 @@ use crate::layered_repository::storage_layer::{Layer, SegmentTag};
use crate::layered_repository::InMemoryLayer;
use crate::relish::*;
use anyhow::Result;
use lazy_static::lazy_static;
use log::*;
use std::cmp::Ordering;
use std::collections::HashSet;
use std::collections::{BTreeMap, BinaryHeap, HashMap};
use std::ops::Bound::Included;
use std::sync::Arc;
use zenith_metrics::{register_int_gauge, IntGauge};
use zenith_utils::lsn::Lsn;
lazy_static! {
static ref NUM_INMEMORY_LAYERS: IntGauge =
register_int_gauge!("pageserver_inmemory_layers", "Number of layers in memory")
.expect("failed to define a metric");
static ref NUM_ONDISK_LAYERS: IntGauge =
register_int_gauge!("pageserver_ondisk_layers", "Number of layers on-disk")
.expect("failed to define a metric");
}
///
/// LayerMap tracks what layers exist on a timeline.
///
@@ -142,6 +153,8 @@ impl LayerMap {
layer: layer,
};
self.open_segs.push(opensegentry);
NUM_INMEMORY_LAYERS.inc();
}
/// Remove the oldest in-memory layer
@@ -151,6 +164,7 @@ impl LayerMap {
let mut segentry = self.segs.get_mut(&segtag).unwrap();
segentry.open = None;
NUM_INMEMORY_LAYERS.dec();
}
///
@@ -172,6 +186,7 @@ impl LayerMap {
};
self.segs.insert(tag, segentry);
}
NUM_ONDISK_LAYERS.inc();
}
///
@@ -186,6 +201,7 @@ impl LayerMap {
if let Some(segentry) = self.segs.get_mut(&tag) {
segentry.historic.remove(&start_lsn);
}
NUM_ONDISK_LAYERS.dec();
}
pub fn list_rels(&self, spcnode: u32, dbnode: u32) -> Result<HashSet<RelTag>> {