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OpenZFS 9617 - too-frequent TXG sync causes excessive write inflation

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Porting notes:
* Renamed zfs_dirty_data_sync_pct to zfs_dirty_data_sync_percent and
  changed the type to be consistent with the other dirty module params.
* Updated zfs-module-parameters.5 accordingly.

Authored by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Serapheim Dimitropoulos <serapheim.dimitro@delphix.com>
Reviewed by: Brad Lewis <brad.lewis@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Andrew Stormont <andyjstormont@gmail.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Approved by: Robert Mustacchi <rm@joyent.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>

OpenZFS-issue: https://illumos.org/issues/9617
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/7928f4ba
Closes #7976
This commit is contained in:
Matthew Ahrens
2017-12-12 15:46:58 -08:00
committed by Brian Behlendorf
parent 58c0f374f1
commit dfbe267503
4 changed files with 18 additions and 11 deletions
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include/sys/dsl_pool.h
+1 -1
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@@ -57,7 +57,7 @@ struct dsl_crypto_params;
extern unsigned long zfs_dirty_data_max;
extern unsigned long zfs_dirty_data_max_max;
extern unsigned long zfs_dirty_data_sync;
extern int zfs_dirty_data_sync_percent;
extern int zfs_dirty_data_max_percent;
extern int zfs_dirty_data_max_max_percent;
extern int zfs_delay_min_dirty_percent;