Adjust ignore thresholds for unstable perf tests
Based on historical data.
```
SELECT
test,
ceil(max(q[3]), 1) AS h
FROM
(
SELECT
test,
query_index,
count(*),
min(event_time),
max(event_time) AS t,
arrayMap(x -> floor(x, 3), quantiles(0, 0.5, 0.95, 1)(stat_threshold)) AS q,
median(stat_threshold) AS m
FROM perftest.query_metrics
WHERE (metric = 'client_time') AND (abs(diff) < 0.05)
GROUP BY
test,
query_index,
query_display_name
HAVING (t > '2020-09-01 00:00:00') AND (m > 0.1)
ORDER BY m DESC
)
GROUP BY test
ORDER BY h DESC
FORMAT TSV
cryptographic_hashes 1.3
collations 0.8
joins_in_memory_pmj 0.8
joins_in_memory 0.7
merge_tree_simple_select 0.7
set_index 0.7
decimal_casts 0.7
website 0.6
logical_functions_medium 0.5
count 0.5
merge_tree_many_partitions 0.5
decimal_aggregates 0.5
codecs_int_insert 0.5
column_column_comparison 0.5
insert_parallel 0.4
parse_engine_file 0.4
read_in_order_many_parts 0.4
logical_functions_small 0.4
parallel_insert 0.3
parallel_index 0.3
push_down_limit 0.3
jit_large_requests 0.3
select_format 0.3
arithmetic 0.3
merge_tree_huge_pk 0.3
materialized_view_parallel_insert 0.3
columns_hashing 0.3
if_array_string 0.3
random_string 0.2
random_printable_ascii 0.2
set 0.2
empty_string_serialization 0.2
```
To apply:
```
sed 's/^\(.*\) \(.*\)$/sed -i "s\/^<test.*$\/<test max_ignored_relative_change="'"'"\2">\/g" tests\/performance\/\1.xml/g' ../bad.tsv | bash
```
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<test max_ignored_relative_change= "0.4" >
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<settings >
<optimize_aggregation_in_order > 1</optimize_aggregation_in_order>
<optimize_read_in_order > 1</optimize_read_in_order>
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<max_partitions_per_insert_block > 2000</max_partitions_per_insert_block>
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<max_threads > 8</max_threads>
</settings>
<substitutions >
<substitution >
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<name > parts</name>
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<values >
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<value > 100</value>
<value > 1000</value>
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</values>
</substitution>
</substitutions>
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<create_query > CREATE TABLE mt_{parts}_parts(id UInt32, val1 UInt32, val2 UInt32) ENGINE = MergeTree ORDER BY val1 PARTITION BY id % {parts}</create_query>
<fill_query > INSERT INTO mt_{parts}_parts SELECT number, rand() % 10000, rand() FROM numbers_mt(100000000)</fill_query>
<fill_query > OPTIMIZE TABLE mt_{parts}_parts FINAL</fill_query>
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<query > SELECT val2 FROM mt_{parts}_parts ORDER BY val1 LIMIT 1000000 FORMAT Null</query>
<query > SELECT val2 FROM mt_{parts}_parts ORDER BY val1 LIMIT 10000000 FORMAT Null</query>
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<query > SELECT sum(val2) FROM mt_{parts}_parts GROUP BY val1 FORMAT Null</query>
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<drop_query > DROP TABLE IF EXISTS mt_{parts}_parts</drop_query>
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</test>
