34047007@qq.com
41b83e3a64
生产 123 万行表(9.8GB)跑批次1时磁盘满回滚(2026-08-10)。 根因二：① alembic 无 transaction_per_migration，批次1的 01+02+03 全在一个 事务，JSON→JSONB 重写空间不释放、与后续重写叠加；② 1421ea169bb6 循环逐个 ALTER 5 个日期字段 = 5 次整表重写，同一事务累积。 修复：alembic.ini 开启 transaction_per_migration（每迁移独立提交，前序空间 释放）；1421ea169bb6 合并 5 列为单条 ALTER（一次重写）。 本地 DB 已在 head 不受影响，heads 仍单一头 55105f0bb1d7。
43 lines
939 B
INI
43 lines
939 B
INI
[alembic]
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script_location = alembic
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sqlalchemy.url = postgresql://scilit:scilit_dev@localhost:5432/scilit
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# Commit each migration in its own transaction (default: whole upgrade in one).
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# Rewrite-heavy migrations (JSON->JSONB / ALTER COLUMN TYPE DATE) on the
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# 1.23M-row prod table peak at huge disk usage; one shared txn accumulates
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# them -> disk-full (2026-08-10 batch 1 incident root cause).
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# Independent commits release space early.
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transaction_per_migration = true
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[loggers]
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keys = root,sqlalchemy,alembic
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[handlers]
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keys = console
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[formatters]
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keys = generic
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[logger_root]
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level = WARN
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handlers = console
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[logger_sqlalchemy]
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level = WARN
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handlers =
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qualname = sqlalchemy.engine
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[logger_alembic]
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level = INFO
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handlers =
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qualname = alembic
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[handler_console]
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class = StreamHandler
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args = (sys.stderr,)
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level = NOTSET
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formatter = generic
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[formatter_generic]
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format = %(levelname)-5.5s [%(name)s] %(message)s
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datefmt = %H:%M:%S
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