1. Make the test truly asynchronous. The setting --async_insert_max_data_size 1 leads to data being flushed synchronously for all inserts in this test. This triggers part creation and extra resource consumption.

2. Do not run the --wait_for_async_insert query as a background process with a fixed (50ms) sleep time after spawning.
   If the execution time is longer than the anticipated delay, it may lead to excessive process creation.

To reproduce the "Connection reset by peer while reading from socket" error [0], increase the number of background threads, e.g.:

--- a/tests/queries/0_stateless/02481_async_insert_race_long.sh
+++ b/tests/queries/0_stateless/02481_async_insert_race_long.sh
@@ -51,7 +51,7 @@ export -f select1

 TIMEOUT=10

-for _ in {1..3}; do
+for _ in {1..32}; do
     insert1 $TIMEOUT &
     insert2 $TIMEOUT &
     insert3 $TIMEOUT &
diff --git a/utils/check-style/check-large-objects.sh b/utils/check-style/check-large-objects.sh

[0] https://s3.amazonaws.com/clickhouse-test-reports/60377/bc9c462155bed43eeb72415660917900ee4e7b58/stateless_tests__tsan__s3_storage__%5B2_4%5D.html

https://github.com/ClickHouse/clickhouse-private/issues/13101

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