ClickHouse/tests/queries/0_stateless/01268_procfs_metrics.sh

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#!/usr/bin/env bash
# Sandbox does not provide CAP_NET_ADMIN capability but does have ProcFS mounted at /proc
# This ensures that OS metrics can be collected
CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
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# shellcheck source=../shell_config.sh
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. "$CURDIR"/../shell_config.sh
function read_numbers_func()
{
$CLICKHOUSE_CLIENT -q "
SELECT * FROM numbers(600000000) FORMAT Null SETTINGS max_threads = 1
";
}
function show_processes_func()
{
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while true; do
sleep 0.1;
# These two system metrics for the generating query above are guaranteed to be nonzero when ProcFS is mounted at /proc
$CLICKHOUSE_CLIENT -q "
SELECT count() > 0 FROM system.processes\
WHERE has(ProfileEvents.Names, 'OSCPUVirtualTimeMicroseconds') AND has(ProfileEvents.Names, 'OSReadChars')\
SETTINGS max_threads = 1
" | grep '1' && break;
done
}
export -f read_numbers_func;
export -f show_processes_func;
TIMEOUT=3
timeout $TIMEOUT bash -c read_numbers_func &
timeout $TIMEOUT bash -c show_processes_func &
wait
echo "Test OK"