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Tom Lane 6b45e3b7aa Arrange to generate different random sequences in the different child ... processes of a pgbench run, when we are using -j > 1 and are emulating threads via fork(). Otherwise the children all inherit the same random sequence state and produce the same random-number sequence. In the threaded case the different threads will share one RNG state, so they will produce different subsets of one sequence, which is maybe more correlated than a purist would like but will not be "the same". So we leave that case alone. First noticed by Takahiro Itagaki, and is also part of the explanation for the pgbench misbehavior recently reported by Jaime Casanova.		16 years ago
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Makefile	Portability and documentation fixes for threaded pgbench patch.	17 years ago
pgbench.c	Arrange to generate different random sequences in the different child	16 years ago