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Fix the getBlobs metric and ensure it is recorded promptly to prevent miscounts (#7188)

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From testing conducted by Sunnyside Labs, they noticed that the "expected blobs" are quite low on bandwidth constrained nodes. This observation revealed that we don't record the `beacon_blobs_from_el_expected_total` metric at all if the EL doesn't return any response. The fetch blobs function returns without recording the metric.

To fix this, I've moved `BLOBS_FROM_EL_EXPECTED_TOTAL` and `BLOBS_FROM_EL_RECEIVED_TOTAL` to as early as possible, to make the metric more accurate.
This commit is contained in:
Jimmy Chen
2025-04-04 20:01:39 +11:00
committed by GitHub
parent 57abffcd99
commit 6a75f24ab1
2 changed files with 24 additions and 22 deletions
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21
beacon_node/beacon_chain/src/metrics.rs
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@@ -1662,28 +1662,37 @@ pub static DATA_COLUMN_SIDECAR_GOSSIP_VERIFICATION_TIMES: LazyLock<Result<Histog
pub static BLOBS_FROM_EL_HIT_TOTAL: LazyLock<Result<IntCounter>> = LazyLock::new(|| {
try_create_int_counter(
"beacon_blobs_from_el_hit_total",
"Number of blob batches fetched from the execution layer",
"Number of non-empty blob batches fetched from the execution layer",
)
});
pub static BLOBS_FROM_EL_MISS_TOTAL: LazyLock<Result<IntCounter>> = LazyLock::new(|| {
try_create_int_counter(
"beacon_blobs_from_el_miss_total",
"Number of blob batches failed to fetch from the execution layer",
"Number of empty blob responses from the execution layer",
)
});
pub static BLOBS_FROM_EL_EXPECTED_TOTAL: LazyLock<Result<IntCounter>> = LazyLock::new(|| {
pub static BLOBS_FROM_EL_ERROR_TOTAL: LazyLock<Result<IntCounter>> = LazyLock::new(|| {
try_create_int_counter(
"beacon_blobs_from_el_expected_total",
"beacon_blobs_from_el_error_total",
"Number of failed blob fetches from the execution layer",
)
});
pub static BLOBS_FROM_EL_EXPECTED: LazyLock<Result<Histogram>> = LazyLock::new(|| {
try_create_histogram_with_buckets(
"beacon_blobs_from_el_expected",
"Number of blobs expected from the execution layer",
Ok(vec![0.0, 3.0, 6.0, 9.0, 12.0, 18.0, 24.0, 30.0]),
)
});
pub static BLOBS_FROM_EL_RECEIVED_TOTAL: LazyLock<Result<IntCounter>> = LazyLock::new(|| {
try_create_int_counter(
pub static BLOBS_FROM_EL_RECEIVED: LazyLock<Result<Histogram>> = LazyLock::new(|| {
try_create_histogram_with_buckets(
"beacon_blobs_from_el_received_total",
"Number of blobs fetched from the execution layer",
linear_buckets(0.0, 4.0, 20),
)
});