20 lines
1.4 KiB
Plaintext
20 lines
1.4 KiB
Plaintext
10,000 inserts: IDENTITY vs SEQUENCE vs UUID, hibernate.jdbc.batch_size=50, flush+clear every 50 rows
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######## H2 ########
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database: H2Dialect / H2 2.4.240 (2025-09-22)
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timings are wall-clock milliseconds on one developer machine, one run each after a warm-up pass: indicative, not a benchmark
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IDENTITY 331 ms prepared=10000 (insert=10000, sequence=0) addBatch=0 executeBatch=0 executeSingle=10000
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SEQUENCE allocationSize=1 226 ms prepared=10200 (insert=200, sequence=10000) addBatch=10000 executeBatch=200 executeSingle=10000
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SEQUENCE allocationSize=50 46 ms prepared=400 (insert=200, sequence=200) addBatch=10000 executeBatch=200 executeSingle=200
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UUID v4 (GenerationType.UUID) 98 ms prepared=200 (insert=200, sequence=0) addBatch=10000 executeBatch=200 executeSingle=0
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UUID v7 (Style.VERSION_7) 64 ms prepared=200 (insert=200, sequence=0) addBatch=10000 executeBatch=200 executeSingle=0
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Hibernate Statistics for the whole session factory (all rows above, including the warm-up): entityInsertCount=55000 prepareStatementCount=23101
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Same SEQUENCE allocationSize=50 entity, hibernate.jdbc.batch_size NOT set:
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SEQUENCE allocationSize=50 68 ms prepared=10201 (insert=10000, sequence=201) addBatch=0 executeBatch=0 executeSingle=10201
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######## POSTGRES ########
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SKIPPED: no Docker daemon was reachable when this transcript was generated, so PostgreSQL was not run.
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