[VL] Add config for memory pool init capacity to reduce arbitration times

[Yohahaha]

What changes were proposed in this pull request?

Add new config spark.gluten.sql.columnar.backend.velox.memInitCapacity to reduce memory arbitration times, default value is 8M.

[github-actions]

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[github-actions]

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[FelixYBW]

We previously hardcoded it as 8M, this PR make it configurable, right?

[Yohahaha]

We previously hardcoded it as 8M, this PR make it configurable, right?

preciously is 0.

[zhztheplayer]

Add new config spark.gluten.sql.columnar.backend.velox.memInitCapacity to reduce memory arbitration times

Is there any difference on performance in your test observed within the change? @Yohahaha

[Yohahaha]

Add new config spark.gluten.sql.columnar.backend.velox.memInitCapacity to reduce memory arbitration times

Is there any difference on performance in your test observed within the change? @Yohahaha

currently, no, but it can reduce the frequency of enter arbitration in theory, and may have benefits when set this config larger, eg 128M.

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[Yohahaha]

/Benchmark Velox

[Yohahaha]

/Benchmark Velox

[GlutenPerfBot]

===== Performance report for TPCH SF2000 with Velox backend, for reference only ====

query	log/native_5815_time.csv	log/native_master_05_13_2024_33f993554_time.csv	difference	percentage
q1	33.80	36.42	2.619	107.75%
q2	23.80	23.70	-0.103	99.57%
q3	36.63	36.61	-0.019	99.95%
q4	38.34	37.83	-0.513	98.66%
q5	70.22	70.62	0.391	100.56%
q6	7.69	7.47	-0.222	97.12%
q7	83.23	85.08	1.850	102.22%
q8	84.52	84.30	-0.220	99.74%
q9	123.03	121.00	-2.030	98.35%
q10	48.44	45.37	-3.074	93.65%
q11	20.49	19.49	-1.004	95.10%
q12	26.99	26.52	-0.465	98.28%
q13	53.52	55.08	1.556	102.91%
q14	17.87	21.53	3.663	120.50%
q15	29.86	29.02	-0.844	97.17%
q16	13.01	14.00	0.990	107.61%
q17	103.31	103.62	0.310	100.30%
q18	144.04	146.24	2.194	101.52%
q19	13.51	13.35	-0.165	98.78%
q20	28.75	29.06	0.311	101.08%
q21	283.60	282.54	-1.057	99.63%
q22	15.21	14.61	-0.599	96.06%
total	1299.87	1303.44	3.570	100.27%