From e3a46477923baac161d8e3c670b9fce3ca8a6b7f Mon Sep 17 00:00:00 2001 From: Brandon Morelli Date: Mon, 24 Feb 2025 11:04:07 -0800 Subject: [PATCH] Update tail-based-sampling.md --- solutions/observability/apps/tail-based-sampling.md | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/solutions/observability/apps/tail-based-sampling.md b/solutions/observability/apps/tail-based-sampling.md index 3fc340701c..7a0a545d9f 100644 --- a/solutions/observability/apps/tail-based-sampling.md +++ b/solutions/observability/apps/tail-based-sampling.md @@ -86,9 +86,13 @@ Policies map trace events to a sample rate. Each policy must specify a sample ra The amount of storage space allocated for trace events matching tail sampling policies. Caution: Setting this limit higher than the allowed space may cause APM Server to become unhealthy. -If the configured storage limit is insufficient, it logs "configured storage limit reached". The event will bypass sampling and will always be indexed when storage limit is reached. +A value of `0GB` (or equivalent) does not set a concrete limit, but rather allows the APM Server to align its disk usage with the disk size. APM server uses up to 80% of the disk size limit on the disk where the local tail-based sampling database is located. The last 20% of disk will not be used by APM Server. It is the recommended value as it automatically scales with the disk size. -Default: `3GB`. (text) +If this is not desired, a concrete `GB` value can be set for the maximum amount of disk used for tail-based sampling. + +If the configured storage limit is insufficient, it logs "configured limit reached". The event will bypass sampling and will always be indexed when storage limit is reached. + +Default: `0GB`. (text) | | | | --- | --- |