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263be33297
Right now 02703_max_local_write_bandwidth is flaky, and the reason I believe is that the server spent spent sometime somewhere else, which means that the throttler will sleep less. But what is important here is that the overall query duration time matches the expectation, so it is OK to match the LocalWriteThrottlerSleepMicroseconds/LocalReadThrottlerSleepMicroseconds with some error rate. Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
40 lines
1.5 KiB
Bash
Executable File
40 lines
1.5 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Tags: no-s3-storage, no-random-settings, no-random-merge-tree-settings
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CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
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# shellcheck source=../shell_config.sh
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. "$CUR_DIR"/../shell_config.sh
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$CLICKHOUSE_CLIENT -nm -q "
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drop table if exists data;
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create table data (key UInt64 CODEC(NONE)) engine=MergeTree() order by tuple() settings min_bytes_for_wide_part=1e9;
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"
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# reading 1e6*8 bytes with 1M bandwith it should take (8-1)/1=7 seconds
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$CLICKHOUSE_CLIENT -q "insert into data select * from numbers(1e6)"
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read_methods=(
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read
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pread
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pread_threadpool
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# NOTE: io_uring doing all IO from one thread, that is not attached to the query
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# io_uring
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# NOTE: mmap cannot be throttled
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# mmap
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)
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for read_method in "${read_methods[@]}"; do
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query_id=$(random_str 10)
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$CLICKHOUSE_CLIENT --query_id "$query_id" -q "select * from data format Null settings max_local_read_bandwidth='1M', local_filesystem_read_method='$read_method'"
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$CLICKHOUSE_CLIENT -nm -q "
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SYSTEM FLUSH LOGS;
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SELECT
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'$read_method',
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query_duration_ms >= 7e3,
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ProfileEvents['ReadBufferFromFileDescriptorReadBytes'] > 8e6,
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ProfileEvents['LocalReadThrottlerBytes'] > 8e6,
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ProfileEvents['LocalReadThrottlerSleepMicroseconds'] > 7e6*0.5
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FROM system.query_log
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WHERE current_database = '$CLICKHOUSE_DATABASE' AND query_id = '$query_id' AND type != 'QueryStart'
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"
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done
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