On 12.02.2019 21:37, Eugene Grosbein wrote:>> vfs.zfs.arc_max=1216348160 > > Each line shows how many megabytes is allocated but currently unused by corresponding > UMA zone (and unavailable for other consumers). Your numbers are pretty low, > you have nothing to worry about IMHO. I have hundreds of megabytes and gigabytes there.I'm have same problem. According to top(1) I have 29G Wired, but only 17G Total ARC (12G difference! System has 32G of RAM), and this statistic shows: 5487.5 zio_data_buf_524288 920.125 zio_data_buf_131072 626 zio_buf_131072 468 zio_data_buf_1048576 398.391 zio_buf_16384 305.464 dnode_t 227.989 zio_buf_512 171.5 zio_data_buf_458752 141.75 zio_data_buf_393216 116.456 dmu_buf_impl_t So, more than 6G (!) is not used in ARC, but hold by ZFS anyway. -- // Lev Serebryakov -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 963 bytes Desc: OpenPGP digital signature URL: <http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20190212/53b56477/attachment.sig>
13.02.2019 1:50, Lev Serebryakov wrote:> I'm have same problem. > > According to top(1) I have 29G Wired, but only 17G Total ARC (12G > difference! System has 32G of RAM), and this statistic shows: > > 5487.5 zio_data_buf_524288 > 920.125 zio_data_buf_131072 > 626 zio_buf_131072 > 468 zio_data_buf_1048576 > 398.391 zio_buf_16384 > 305.464 dnode_t > 227.989 zio_buf_512 > 171.5 zio_data_buf_458752 > 141.75 zio_data_buf_393216 > 116.456 dmu_buf_impl_t > > So, more than 6G (!) is not used in ARC, but hold by ZFS anyway.dnode_t and dmu_buf_impl_t are parts of ZFS too, so these numbers represent about 9G, not 6G. Do you have/had some memory pressure here? Growth of swap usage?