Created
April 1, 2020 20:48
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Performance Schema Histogram
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WITH histogram AS ( | |
SELECT | |
digest, | |
CASE | |
WHEN bucket_timer_low > 10000000000000 THEN '10s' | |
WHEN bucket_timer_low > 1000000000000 THEN '1s' | |
WHEN bucket_timer_low > 100000000000 THEN '100ms' | |
WHEN bucket_timer_low > 10000000000 THEN '10ms' | |
WHEN bucket_timer_low > 1000000000 THEN '1ms' | |
WHEN bucket_timer_low > 100000000 THEN '100us' | |
WHEN bucket_timer_low > 10000000 THEN '10us' | |
ELSE '1us' | |
END as bucket_name, | |
FLOOR(SUM(count_bucket) / sum(SUM(count_bucket)) OVER (PARTITION BY digest)*100) as pct | |
FROM performance_schema.events_statements_histogram_by_digest | |
GROUP BY digest, bucket_name | |
), | |
ascii AS ( | |
SELECT digest, GROUP_CONCAT(CONCAT_WS(' ', '\n', bucket_name, ' ', REPEAT('#', pct)) SEPARATOR '') as asciiart FROM histogram GROUP BY digest | |
) | |
SELECT sa.*, ascii.asciiart AS histogram FROM sys.statement_analysis sa INNER JOIN ascii USING (digest) | |
ORDER BY exec_count DESC LIMIT 100 | |
\G | |
.. | |
*************************** 1. row *************************** | |
query: SELECT * FROM `city` WHERE `id` > ? | |
db: world | |
full_scan: | |
exec_count: 5 | |
err_count: 0 | |
warn_count: 0 | |
total_latency: 17.83 ms | |
max_latency: 7.32 ms | |
avg_latency: 3.57 ms | |
lock_latency: 1.02 ms | |
rows_sent: 10116 | |
rows_sent_avg: 2023 | |
rows_examined: 10116 | |
rows_examined_avg: 2023 | |
rows_affected: 0 | |
rows_affected_avg: 0 | |
tmp_tables: 0 | |
tmp_disk_tables: 0 | |
rows_sorted: 0 | |
sort_merge_passes: 0 | |
digest: 035932271023f7be929ccbcf6e32a50aff3680aaeebba7bca35f16b3ef3161ad | |
first_seen: 2020-04-01 14:46:17.412329 | |
last_seen: 2020-04-01 14:46:33.321191 | |
histogram: | |
1s | |
10s | |
100ms | |
10ms | |
1ms ############################################################ | |
100us ######################################## | |
10us | |
1us |
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