henning parent
Yes, this what the people who will curse you out and judge you for not using wide events omits: it will greatly increase storage costs compared to the normal metrics + traces + sample based logging that is conventional. It has both a benefit and a cost, and the cost part is always omitted.
ClickHouse is pretty good at compressing the wide events, so it's not that dramatic compared to the benefits of having high-cardinality telemetry. check this out: https://clickhouse.com/blog/optimize-clickhouse-codecs-compr...
Properly implemented wide events usually reduce storage costs comparing to typical chaotic logging of everything. It is expected that a single external request leads to exactly one wide event with all the information about this request, which may be needed for further debugging and analytics. See https://jeremymorrell.dev/blog/a-practitioners-guide-to-wide... .