Hello Eugene, Tuesday, February 12, 2019, 10:18:09 PM, you 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? I don't have memory pressure right now, but according to my previous experience, ARC will not grow anymore even under heavy disk load (I don't have vfs.zfs.arc_max set). Before new ARC (vfs.zfs.abd_scatter_enabled) I had typically ALL memory occuped by ARC, Wired memory was almost exactly equal to ARC, and ARC hitrate was higher (but I have not exact numbers, unfortunately). Now I have "vfs.zfs.abd_scatter_enabled=0", but still Wired is much larger that ARC under any disk load (it is mostly torrent box). -- Best regards, Lev mailto:l...@freebsd.org _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
