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daabddaac1
After initial arc_c was reduced to arc_c_min it became possible that on datasets with primarycache=metadata or none dirty data make up most of ARC capacity and easily more than configured 50% of initial arc_c, that causes forced txg commits by arc_tempreserve_space() and periodic very long write delays. This patch makes arc_tempreserve_space() to use arc_c only after ARC warmed up once and arc_c really means something, but use arc_c_max before that. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Reviewed-by: Matt Macy <mmacy@FreeBSD.org> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Sponsored-By: iXsystems, Inc. Closes #11178 |
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