From a257a12110db0b35feb69dfb53676177ef1e543b Mon Sep 17 00:00:00 2001
From: chonghe <44791194+chong-he@users.noreply.github.com>
Date: Thu, 1 Feb 2024 01:32:38 +0800
Subject: [PATCH] Add a note about validator monitoring in Lighthouse book
 (#5143)

* Add validator monitor
---
 book/src/validator-monitoring.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/book/src/validator-monitoring.md b/book/src/validator-monitoring.md
index 893ec90bdd..71b1632a79 100644
--- a/book/src/validator-monitoring.md
+++ b/book/src/validator-monitoring.md
@@ -57,6 +57,7 @@ Monitor the mainnet validators at indices `0` and `1`:
 ```
 lighthouse bn --validator-monitor-pubkeys 0x933ad9491b62059dd065b560d256d8957a8c402cc6e8d8ee7290ae11e8f7329267a8811c397529dac52ae1342ba58c95,0xa1d1ad0714035353258038e964ae9675dc0252ee22cea896825c01458e1807bfad2f9969338798548d9858a571f7425c
 ```
+> Note: The validator monitoring will stop collecting per-validator Prometheus metrics and issuing per-validator logs when the number of validators reaches 64. To continue collecting metrics and logging, use the flag `--validator-monitor-individual-tracking-threshold N` where `N` is a number greater than the number of validators to monitor. 
 
 ## Observing Monitoring