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【详述】首次查询性慢,starrocks的单个明细表中3亿数据,1FE (5GB) + 3BE (10GB * 3),首次查询数据时耗时很高,超过30S,查询过后如果继续查询,速度就会很快(几百毫秒)
表中一共95列,dimensions_object_id列加了bitmap索引
SELECT timestamp,
dimensions_object_id,
metrics_bandwidth,
metrics_responseTime,
metrics_throughput,
metrics_readBandwidth,
metrics_writeBandwidth,
metrics_readThroughput,
metrics_writeThroughput,
metrics_readHitRatio,
metrics_writeHitRatio
FROM perfdata_db.perf_lun
WHERE dimensions_object_id IN
(‘283211BBD4E436DB9334D6A8F3951AA9’, ‘4814B840173E3562A9331F9C62C6DF13’, ‘929870064CDB3A2AA58B11E6BE631A3A’,
‘C46D9A621C873C78A7FE2607FB7D0ADA’,
‘F56E418F54CD38C68C4F8C928E02D3FE’, ‘C868FF0785983332BB74F18B6C7DBF23’, ‘F5B1AF629B71391AB4E01BC0046F3326’,
‘FE507728FC77399D8212D736F77ADC8B’,
‘80A42A8906333B12BEE624968B31024F’, ‘D0E987625B2F3CBBAA27C07A8925E241’)
AND timestamp > ‘2025-01-19 16:00:00’
ORDER BY timestamp
LIMIT 1000;
【背景】无
【业务影响】接口响应慢
【是否存算分离】 否
【StarRocks版本】3.3.7
【集群规模】1FE (5GB) + 3BE (10GB * 3)(fe与be混部)
【机器信息】32核/128G
【联系方式】StarRock社区群21
【附件】70cdb37a-d6dd-11ef-805d-b25217b26d38profile.txt (44.7 KB)