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[feature](statistics)Support partition stats cache #35517

Merged
merged 1 commit into from
May 29, 2024
Merged

[feature](statistics)Support partition stats cache #35517

merged 1 commit into from
May 29, 2024

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Jibing-Li
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@Jibing-Li Jibing-Li commented May 28, 2024 •
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Support cache partition level stats and show partition level cached stats.
Nereids could call StatisticsCache.getPartitionStatistics to fetch cached partition stats.

Further comments

If this is a relatively large or complex change, kick off the discussion at [email protected] by explaining why you chose the solution you did and what alternatives you considered, etc...

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Since 2024-03-18, the Document has been moved to doris-website.
See Doris Document.

@Jibing-Li Jibing-Li marked this pull request as ready for review May 28, 2024 08:10
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run buildall

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TPC-H: Total hot run time: 40895 ms 
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpch-tools
Tpch sf100 test result on commit 06755f64b101b8267c14b4c3c85b78973be7aacb, data reload: false

------ Round 1 ----------------------------------
q1	18007	4580	4388	4388
q2	2622	206	206	206
q3	11473	1298	1185	1185
q4	10490	692	810	692
q5	7771	2741	2713	2713
q6	220	139	138	138
q7	969	617	617	617
q8	9287	2125	2086	2086
q9	9240	6518	6489	6489
q10	8930	3736	3698	3698
q11	439	249	239	239
q12	434	221	227	221
q13	17770	2992	3009	2992
q14	267	224	226	224
q15	515	467	465	465
q16	536	380	391	380
q17	982	663	796	663
q18	8137	7530	7471	7471
q19	6291	1505	1544	1505
q20	655	324	320	320
q21	4946	3952	3931	3931
q22	345	278	272	272
Total cold run time: 120326 ms
Total hot run time: 40895 ms

----- Round 2, with runtime_filter_mode=off -----
q1	4491	4221	4240	4221
q2	359	257	269	257
q3	2967	2707	2751	2707
q4	1862	1591	1544	1544
q5	5290	5318	5306	5306
q6	213	124	126	124
q7	2113	1760	1729	1729
q8	3275	3317	3323	3317
q9	8357	8386	8389	8386
q10	3864	3620	3751	3620
q11	577	495	499	495
q12	761	603	602	602
q13	17617	2992	3006	2992
q14	289	289	277	277
q15	513	476	488	476
q16	463	423	430	423
q17	1785	1500	1483	1483
q18	7692	7620	7383	7383
q19	1663	1574	1608	1574
q20	1998	1774	1840	1774
q21	4750	4796	4777	4777
q22	580	512	513	512
Total cold run time: 71479 ms
Total hot run time: 53979 ms

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TPC-DS: Total hot run time: 172809 ms 
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpcds-tools
TPC-DS sf100 test result on commit 06755f64b101b8267c14b4c3c85b78973be7aacb, data reload: false

query1	920	380	371	371
query2	6459	2382	2295	2295
query3	6665	209	209	209
query4	20172	17507	17289	17289
query5	4143	424	424	424
query6	257	153	164	153
query7	4593	305	301	301
query8	240	192	189	189
query9	8540	2446	2433	2433
query10	445	276	259	259
query11	10733	9980	10059	9980
query12	140	90	91	90
query13	1644	385	375	375
query14	9689	7664	7648	7648
query15	270	163	166	163
query16	8120	267	265	265
query17	1863	527	547	527
query18	2061	278	274	274
query19	211	152	151	151
query20	96	91	84	84
query21	209	137	134	134
query22	4446	4004	3829	3829
query23	33535	32976	34517	32976
query24	11907	2858	2831	2831
query25	514	356	364	356
query26	1086	155	154	154
query27	2864	332	324	324
query28	7383	2080	2068	2068
query29	838	624	619	619
query30	288	149	159	149
query31	999	770	743	743
query32	95	53	55	53
query33	759	273	288	273
query34	963	497	470	470
query35	754	608	601	601
query36	1104	919	906	906
query37	192	65	67	65
query38	2896	2720	2765	2720
query39	879	809	811	809
query40	278	132	124	124
query41	50	45	43	43
query42	105	95	97	95
query43	572	529	545	529
query44	1200	733	734	733
query45	180	164	161	161
query46	1056	701	741	701
query47	1851	1755	1753	1753
query48	376	300	300	300
query49	1174	378	388	378
query50	779	390	388	388
query51	6898	6722	6726	6722
query52	110	89	91	89
query53	355	310	286	286
query54	854	439	438	438
query55	72	72	72	72
query56	273	252	270	252
query57	1152	1054	1031	1031
query58	240	215	213	213
query59	3332	3138	3144	3138
query60	282	263	264	263
query61	92	85	87	85
query62	658	455	436	436
query63	310	291	299	291
query64	9764	2333	1741	1741
query65	3194	3096	3119	3096
query66	1221	334	330	330
query67	15311	15033	14875	14875
query68	4617	556	539	539
query69	446	274	268	268
query70	1176	1110	1148	1110
query71	416	267	269	267
query72	7001	5298	5613	5298
query73	735	327	334	327
query74	6018	5620	5642	5620
query75	3356	2612	2650	2612
query76	2895	1065	984	984
query77	396	269	261	261
query78	10363	9762	9700	9700
query79	2153	515	505	505
query80	1121	448	456	448
query81	522	219	217	217
query82	644	104	92	92
query83	283	178	167	167
query84	242	89	85	85
query85	1689	281	270	270
query86	469	310	320	310
query87	3274	3106	3107	3106
query88	4289	2460	2460	2460
query89	483	397	376	376
query90	2007	189	187	187
query91	128	98	148	98
query92	64	50	52	50
query93	2266	534	513	513
query94	1238	192	188	188
query95	409	308	312	308
query96	605	273	274	273
query97	3183	3029	2997	2997
query98	237	221	221	221
query99	1213	829	863	829
Total cold run time: 274649 ms
Total hot run time: 172809 ms

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ClickBench: Total hot run time: 30.38 s 
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/clickbench-tools
ClickBench test result on commit 06755f64b101b8267c14b4c3c85b78973be7aacb, data reload: false

query1	0.04	0.03	0.04
query2	0.08	0.04	0.04
query3	0.23	0.06	0.05
query4	1.67	0.11	0.10
query5	0.51	0.49	0.51
query6	1.13	0.73	0.74
query7	0.02	0.02	0.01
query8	0.05	0.04	0.04
query9	0.54	0.48	0.49
query10	0.55	0.55	0.53
query11	0.15	0.11	0.11
query12	0.15	0.12	0.12
query13	0.60	0.60	0.60
query14	0.79	0.78	0.80
query15	0.84	0.81	0.82
query16	0.34	0.35	0.37
query17	0.96	0.95	0.95
query18	0.20	0.23	0.26
query19	1.81	1.74	1.66
query20	0.01	0.01	0.01
query21	15.71	0.66	0.66
query22	4.38	6.61	1.85
query23	18.28	1.38	1.21
query24	1.99	0.21	0.20
query25	0.14	0.08	0.08
query26	0.26	0.17	0.17
query27	0.08	0.08	0.07
query28	13.32	1.02	1.01
query29	13.22	3.34	3.28
query30	0.27	0.07	0.08
query31	2.84	0.39	0.38
query32	3.30	0.48	0.47
query33	2.91	2.93	2.96
query34	17.25	4.39	4.37
query35	4.51	4.52	4.47
query36	0.65	0.46	0.47
query37	0.18	0.16	0.15
query38	0.16	0.16	0.15
query39	0.05	0.04	0.03
query40	0.16	0.13	0.15
query41	0.09	0.05	0.05
query42	0.06	0.04	0.05
query43	0.04	0.03	0.04
Total cold run time: 110.52 s
Total hot run time: 30.38 s

morrySnow
morrySnow reviewed May 28, 2024
View reviewed changes
fe/fe-core/src/main/java/org/apache/doris/analysis/ShowColumnStatsStmt.java Outdated Show resolved Hide resolved
fe/fe-core/src/main/java/org/apache/doris/statistics/PartitionStatistic.java Outdated Show resolved Hide resolved
fe/fe-core/src/main/java/org/apache/doris/statistics/PartitionStatistic.java Outdated Show resolved Hide resolved
fe/fe-core/src/main/java/org/apache/doris/statistics/PartitionStatistic.java Outdated Show resolved Hide resolved
fe/fe-core/src/main/java/org/apache/doris/statistics/PartitionStatistic.java Outdated Show resolved Hide resolved
fe/fe-core/src/main/java/org/apache/doris/statistics/PartitionStatisticBuilder.java Outdated Show resolved Hide resolved
fe/fe-core/src/main/java/org/apache/doris/statistics/PartitionStatisticCacheLoader.java Outdated Show resolved Hide resolved
fe/fe-core/src/main/java/org/apache/doris/statistics/StatisticsRepository.java Outdated Show resolved Hide resolved
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run buildall

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TPC-H: Total hot run time: 40496 ms 
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpch-tools
Tpch sf100 test result on commit 99fa9906feeb54acfee6d5ae4165a9758bf58fb5, data reload: false

------ Round 1 ----------------------------------
q1	17910	4691	4390	4390
q2	2649	199	200	199
q3	10973	1242	1208	1208
q4	10778	802	807	802
q5	7508	2739	2719	2719
q6	223	141	138	138
q7	962	604	611	604
q8	9346	2105	2136	2105
q9	9219	6535	6512	6512
q10	9023	3753	3744	3744
q11	456	240	242	240
q12	456	229	228	228
q13	17757	3033	3018	3018
q14	261	221	229	221
q15	515	468	476	468
q16	512	375	376	375
q17	972	727	704	704
q18	8192	7423	7412	7412
q19	4500	1548	1518	1518
q20	646	322	308	308
q21	5031	3309	3939	3309
q22	336	280	274	274
Total cold run time: 118225 ms
Total hot run time: 40496 ms

----- Round 2, with runtime_filter_mode=off -----
q1	4313	4220	4214	4214
q2	377	269	261	261
q3	3000	2785	2750	2750
q4	1869	1586	1641	1586
q5	5256	5268	5300	5268
q6	208	126	125	125
q7	2093	1750	1762	1750
q8	3215	3338	3348	3338
q9	8403	8390	8377	8377
q10	3922	3718	3668	3668
q11	583	516	480	480
q12	733	618	590	590
q13	17353	2984	2997	2984
q14	295	248	254	248
q15	514	478	473	473
q16	482	414	413	413
q17	1758	1475	1484	1475
q18	7659	7577	7493	7493
q19	1693	1613	1589	1589
q20	2027	1824	1814	1814
q21	4980	4730	4722	4722
q22	589	483	518	483
Total cold run time: 71322 ms
Total hot run time: 54101 ms

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TPC-DS: Total hot run time: 169452 ms 
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpcds-tools
TPC-DS sf100 test result on commit 99fa9906feeb54acfee6d5ae4165a9758bf58fb5, data reload: false

query1	925	380	370	370
query2	7053	2401	2437	2401
query3	6655	206	204	204
query4	19276	17604	17435	17435
query5	4211	421	421	421
query6	253	160	155	155
query7	4584	294	290	290
query8	238	189	203	189
query9	8550	2367	2362	2362
query10	448	277	255	255
query11	10642	10176	10271	10176
query12	137	91	89	89
query13	1655	371	365	365
query14	9286	7632	6155	6155
query15	253	163	167	163
query16	8022	266	265	265
query17	1842	525	501	501
query18	1891	272	265	265
query19	208	148	152	148
query20	92	87	83	83
query21	194	129	129	129
query22	4422	4213	4261	4213
query23	33583	32962	33240	32962
query24	12046	2832	2806	2806
query25	634	347	360	347
query26	1697	159	154	154
query27	3124	324	316	316
query28	7654	2068	2049	2049
query29	1004	607	598	598
query30	292	154	156	154
query31	1014	754	733	733
query32	93	53	54	53
query33	767	284	306	284
query34	1015	495	471	471
query35	746	599	619	599
query36	1079	934	943	934
query37	274	66	68	66
query38	2900	2773	2751	2751
query39	817	779	772	772
query40	270	125	122	122
query41	45	43	46	43
query42	104	97	92	92
query43	585	549	567	549
query44	1193	734	747	734
query45	180	160	162	160
query46	1067	737	752	737
query47	1889	1782	1783	1782
query48	374	302	307	302
query49	1208	381	378	378
query50	764	395	382	382
query51	6890	6841	6741	6741
query52	105	88	91	88
query53	354	295	286	286
query54	999	433	441	433
query55	74	102	71	71
query56	256	238	245	238
query57	1165	1038	1053	1038
query58	235	218	213	213
query59	3330	3147	3070	3070
query60	277	256	261	256
query61	95	92	86	86
query62	639	454	465	454
query63	314	282	283	282
query64	9768	2240	1733	1733
query65	3153	3111	3149	3111
query66	1339	331	329	329
query67	15575	15148	15054	15054
query68	4518	538	536	536
query69	459	264	269	264
query70	1173	1055	1143	1055
query71	421	275	267	267
query72	7439	5471	2728	2728
query73	710	325	319	319
query74	5975	5676	5594	5594
query75	3598	2599	2657	2599
query76	3033	1043	1000	1000
query77	630	262	268	262
query78	10349	9777	9746	9746
query79	1971	515	509	509
query80	937	435	427	427
query81	521	223	223	223
query82	649	99	90	90
query83	267	173	170	170
query84	237	87	85	85
query85	1682	268	269	268
query86	479	311	306	306
query87	3302	3147	3120	3120
query88	4205	2334	2343	2334
query89	493	413	384	384
query90	1985	194	190	190
query91	134	110	110	110
query92	59	50	57	50
query93	2194	500	501	500
query94	1265	198	252	198
query95	416	312	319	312
query96	583	265	267	265
query97	3188	3046	3088	3046
query98	237	224	210	210
query99	1188	878	838	838
Total cold run time: 276120 ms
Total hot run time: 169452 ms

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ClickBench: Total hot run time: 30.4 s 
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/clickbench-tools
ClickBench test result on commit 99fa9906feeb54acfee6d5ae4165a9758bf58fb5, data reload: false

query1	0.04	0.03	0.03
query2	0.09	0.04	0.04
query3	0.23	0.05	0.05
query4	1.66	0.08	0.09
query5	0.51	0.49	0.50
query6	1.12	0.71	0.73
query7	0.02	0.02	0.02
query8	0.05	0.04	0.05
query9	0.53	0.49	0.48
query10	0.54	0.55	0.54
query11	0.15	0.12	0.11
query12	0.14	0.12	0.12
query13	0.60	0.60	0.60
query14	0.79	0.78	0.78
query15	0.82	0.82	0.82
query16	0.36	0.36	0.37
query17	1.02	0.98	0.95
query18	0.23	0.23	0.24
query19	1.82	1.70	1.67
query20	0.02	0.01	0.02
query21	15.72	0.68	0.66
query22	4.32	7.63	1.75
query23	18.31	1.31	1.26
query24	2.09	0.21	0.21
query25	0.14	0.09	0.09
query26	0.26	0.17	0.17
query27	0.08	0.08	0.08
query28	13.30	1.02	0.99
query29	13.19	3.36	3.32
query30	0.24	0.06	0.06
query31	2.85	0.39	0.38
query32	3.30	0.48	0.47
query33	2.84	2.92	2.90
query34	17.06	4.40	4.39
query35	4.53	4.52	4.48
query36	0.65	0.46	0.46
query37	0.18	0.16	0.16
query38	0.15	0.15	0.15
query39	0.05	0.03	0.04
query40	0.16	0.14	0.13
query41	0.09	0.05	0.06
query42	0.06	0.04	0.05
query43	0.04	0.04	0.04
Total cold run time: 110.35 s
Total hot run time: 30.4 s

morrySnow
morrySnow previously approved these changes May 29, 2024
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@github-actions github-actions bot added the approved Indicates a PR has been approved by one committer. label May 29, 2024
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PR approved by at least one committer and no changes requested.

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PR approved by anyone and no changes requested.

@github-actions github-actions bot removed the approved Indicates a PR has been approved by one committer. label May 29, 2024
@Jibing-Li
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run buildall

@github-actions github-actions bot added the approved Indicates a PR has been approved by one committer. label May 29, 2024
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PR approved by at least one committer and no changes requested.

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TPC-H: Total hot run time: 40030 ms 
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpch-tools
Tpch sf100 test result on commit 3657ad2caaa02b4ccd60174456d9f87c83397b56, data reload: false

------ Round 1 ----------------------------------
q1	18060	4389	4349	4349
q2	2466	197	190	190
q3	11324	1215	1212	1212
q4	11197	798	846	798
q5	8498	2698	2689	2689
q6	219	134	137	134
q7	948	604	596	596
q8	9216	2048	2037	2037
q9	8840	6504	6446	6446
q10	8967	3717	3693	3693
q11	464	248	238	238
q12	449	222	223	222
q13	17769	3027	2979	2979
q14	254	217	231	217
q15	518	486	489	486
q16	526	396	373	373
q17	951	662	691	662
q18	8016	7370	7495	7370
q19	5694	1547	1521	1521
q20	645	305	295	295
q21	4905	3777	3244	3244
q22	340	279	296	279
Total cold run time: 120266 ms
Total hot run time: 40030 ms

----- Round 2, with runtime_filter_mode=off -----
q1	4311	4216	4174	4174
q2	362	280	270	270
q3	2972	2757	2682	2682
q4	1805	1575	1600	1575
q5	5247	5268	5231	5231
q6	208	123	124	123
q7	2091	1761	1763	1761
q8	3190	3305	3297	3297
q9	8340	8313	8318	8313
q10	3876	3659	3681	3659
q11	601	489	512	489
q12	782	603	607	603
q13	16335	2974	3002	2974
q14	301	273	256	256
q15	513	467	470	467
q16	478	417	420	417
q17	1789	1498	1487	1487
q18	7701	7682	7385	7385
q19	1648	1583	1525	1525
q20	2003	1770	1807	1770
q21	4845	4770	4722	4722
q22	581	497	496	496
Total cold run time: 69979 ms
Total hot run time: 53676 ms

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TPC-DS: Total hot run time: 173036 ms 
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpcds-tools
TPC-DS sf100 test result on commit 3657ad2caaa02b4ccd60174456d9f87c83397b56, data reload: false

query1	943	384	380	380
query2	6475	2466	2405	2405
query3	6672	205	212	205
query4	19584	17541	17385	17385
query5	4113	437	428	428
query6	266	161	157	157
query7	4578	304	303	303
query8	235	193	181	181
query9	8514	2370	2348	2348
query10	455	291	263	263
query11	10683	10201	10104	10104
query12	155	86	88	86
query13	1641	383	374	374
query14	8536	8089	7567	7567
query15	217	179	170	170
query16	7828	269	258	258
query17	1861	532	520	520
query18	1962	272	264	264
query19	201	159	166	159
query20	101	87	87	87
query21	199	134	134	134
query22	4282	3866	3904	3866
query23	33769	33130	33044	33044
query24	11769	2854	2941	2854
query25	683	346	359	346
query26	1818	164	162	162
query27	2944	313	319	313
query28	7669	2059	2068	2059
query29	1157	622	610	610
query30	291	152	154	152
query31	960	765	735	735
query32	91	53	55	53
query33	763	273	282	273
query34	992	479	485	479
query35	771	612	585	585
query36	1054	921	920	920
query37	278	67	67	67
query38	2887	2779	2751	2751
query39	880	805	818	805
query40	273	129	122	122
query41	48	43	45	43
query42	107	95	98	95
query43	565	532	545	532
query44	1219	742	755	742
query45	180	162	159	159
query46	1089	770	745	745
query47	1855	1776	1748	1748
query48	388	314	307	307
query49	1192	392	394	392
query50	779	384	393	384
query51	6733	6739	6726	6726
query52	105	91	92	91
query53	351	290	297	290
query54	965	466	426	426
query55	73	72	72	72
query56	264	249	248	248
query57	1157	1030	1061	1030
query58	233	215	227	215
query59	3387	3265	3070	3070
query60	285	263	258	258
query61	91	88	85	85
query62	670	452	459	452
query63	315	290	292	290
query64	9830	2194	1737	1737
query65	3241	3107	3135	3107
query66	1394	325	324	324
query67	15080	15038	14708	14708
query68	4589	548	535	535
query69	463	267	276	267
query70	1191	1136	1106	1106
query71	408	276	275	275
query72	7727	5536	5305	5305
query73	735	329	327	327
query74	6052	5591	5535	5535
query75	3534	2625	2633	2625
query76	2848	971	978	971
query77	439	269	267	267
query78	10228	9904	9817	9817
query79	2599	512	519	512
query80	1091	446	427	427
query81	535	223	221	221
query82	739	95	89	89
query83	250	169	170	169
query84	239	89	85	85
query85	1465	279	269	269
query86	466	314	306	306
query87	3265	3097	3103	3097
query88	4209	2470	2510	2470
query89	473	396	386	386
query90	2009	192	192	192
query91	125	95	103	95
query92	59	47	51	47
query93	1773	515	505	505
query94	1193	185	182	182
query95	396	311	308	308
query96	585	269	266	266
query97	3180	3057	3079	3057
query98	235	231	221	221
query99	1123	859	852	852
Total cold run time: 274369 ms
Total hot run time: 173036 ms

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ClickBench: Total hot run time: 30.63 s 
machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/clickbench-tools
ClickBench test result on commit 3657ad2caaa02b4ccd60174456d9f87c83397b56, data reload: false

query1	0.04	0.03	0.03
query2	0.08	0.04	0.04
query3	0.24	0.05	0.05
query4	1.68	0.07	0.07
query5	0.50	0.49	0.48
query6	1.13	0.72	0.72
query7	0.02	0.01	0.01
query8	0.06	0.04	0.04
query9	0.55	0.48	0.50
query10	0.53	0.55	0.54
query11	0.16	0.12	0.12
query12	0.15	0.13	0.12
query13	0.59	0.59	0.59
query14	0.80	0.78	0.79
query15	0.84	0.82	0.82
query16	0.37	0.38	0.36
query17	0.96	1.02	1.02
query18	0.22	0.25	0.25
query19	1.92	1.78	1.75
query20	0.01	0.01	0.02
query21	15.58	0.67	0.66
query22	4.14	7.45	1.79
query23	18.27	1.29	1.30
query24	1.90	0.23	0.22
query25	0.14	0.09	0.08
query26	0.26	0.16	0.17
query27	0.08	0.08	0.07
query28	13.24	1.02	1.01
query29	13.14	3.37	3.36
query30	0.24	0.06	0.06
query31	2.85	0.39	0.38
query32	3.30	0.47	0.48
query33	2.86	2.88	2.89
query34	17.30	4.39	4.46
query35	4.52	4.49	4.53
query36	0.65	0.46	0.46
query37	0.18	0.16	0.16
query38	0.15	0.14	0.15
query39	0.04	0.05	0.03
query40	0.17	0.14	0.14
query41	0.09	0.04	0.04
query42	0.05	0.04	0.04
query43	0.04	0.03	0.04
Total cold run time: 110.04 s
Total hot run time: 30.63 s

@Jibing-Li Jibing-Li merged commit d35888a into apache:master May 29, 2024
25 of 28 checks passed
@Jibing-Li Jibing-Li deleted the cache branch May 30, 2024 03:45
@Jibing-Li Jibing-Li added not-merge/2.0 do not merge into 2.0 branch not-merge/2.1 labels May 30, 2024
dataroaring pushed a commit that referenced this pull request May 31, 2024
@Jibing-Li @dataroaring
[feature](statistics)Support partition stats cache (#35517)
cc4a447 
Support cache partition level stats and show partition level cached
stats.
Nereids could call StatisticsCache.getPartitionStatistics to fetch
cached partition stats.

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@morrySnow morrySnow morrySnow approved these changes

@englefly englefly englefly approved these changes

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@Jibing-Li @doris-robot @englefly @morrySnow @dataroaring