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Commit6382448
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For bulk write operations (eg COPY IN), use a ring buffer of 16MB instead
of the 256KB limit originally enforced by a patch committed 2008-11-06.Per recent test results, the smaller size resulted in an undesirable decreasein bulk data loading speed, due to COPY processing frequently getting blockedfor WAL flushing. This area might need more tweaking later, but this settingseems to be good enough for 8.4.1 parent3f1e529 commit6382448
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