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illumos/illumos-gate@5cb8d943bc https://www.illumos.org/issues/8835: Sequential reads not aligned to block size are not detected by ZFS prefetcher as sequential, killing prefetch and severely hurting performance. It is caused by dmu_zfetch() in case of misaligned sequential accesses being called with overlap of one block. Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Allan Jude <allanjude@freebsd.org> Approved by: Gordon Ross <gwr@nexenta.com> Author: Alexander Motin <mav@FreeBSD.org> |
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OPENSOLARIS.LICENSE |