| commit | 4ff0b4082e606911e580e65ca217fc1145c86d14 | |
| author | Matthew Dillon <dillon@apollo.backplane.com> | |
| Mon, 11 Sep 2017 21:46:31 +0000 (11 14:46 -0700) | ||
| committer | Matthew Dillon <dillon@apollo.backplane.com> | |
| Mon, 11 Sep 2017 21:51:00 +0000 (11 14:51 -0700) | ||
| tree | dfa643d8c32a01e0af40d66228d537402cdf7af8 | treesnapshot (tar.gz zip) |
| parent | d1604347da547e02f356d4a159c59ce4be79a132 | commitdiff |
hammer2 - Limit bulkfree cpu and SSD I/O
* Limit resource utilization when running bulkfree. The default is 5000
tps (meta-data blocks per second) and can be changed via the
vfs.hammer2.bulkfree_tps sysctl.
* Designed primarily to limit cpu utilization when meta-data is cached,
and to limit SSD utilization otherwise. This feature generally cannot
be used to limit HDD utilization because it cannot currently distinguish
between cached and uncached I/O. Setting a low a number to accomodate
a HDD will cause bulkfree to take way too long to run.
* Limit resource utilization when running bulkfree. The default is 5000
tps (meta-data blocks per second) and can be changed via the
vfs.hammer2.bulkfree_tps sysctl.
* Designed primarily to limit cpu utilization when meta-data is cached,
and to limit SSD utilization otherwise. This feature generally cannot
be used to limit HDD utilization because it cannot currently distinguish
between cached and uncached I/O. Setting a low a number to accomodate
a HDD will cause bulkfree to take way too long to run.