On Wed, Sep 14, 2011 at 2:30 PM, Richard Elling <richard.ell...@gmail.com> wrote:
> I don't recall a bug with that description. However, there are several bugs > that > relate to how the internals work that were fixed last summer and led to the > on-disk format change to version 26 (Improved snapshot deletion performance). > Look for details > in http://src.illumos.org/source/history/illumos-gate/usr/src/uts/common/fs/zfs/ > during the May-July 2010 timeframe. Methinks the most important change was > 6948890 snapshot deletion can induce pathologically long spa_sync() times > spa_sync() is called when the transaction group is sync'ed to permanent > storage. I looked through that list, and found the following that looked applicable: 6948911 snapshot deletion can induce unsatisfiable allocations in txg sync 6948890 snapshot deletion can induce pathologically long spa_sync() times But all I get at bugs.opensolaris.org is a Service Temporarily Unavailable message (and have for at least the past few weeks). The MOS lookup of the 6948890 bug yields the title and not much else, no details. I can't even find the 6948911 bug in MOS. MOS == My Oracle Support Thanks for the pointers, I just wish I could find more data that will lead me to either: A) a mechanism to estimate the RAM needed to destroy a pre-26 snapshot -or- B) indication that there is no way to do A. >From watching the system try to import this pool, it looks like it is still building a kernel structure in RAM when the system runs out of RAM. It has not committed anything to disk. -- {--------1---------2---------3---------4---------5---------6---------7---------} Paul Kraus -> Senior Systems Architect, Garnet River ( http://www.garnetriver.com/ ) -> Sound Designer: Frankenstein, A New Musical (http://www.facebook.com/event.php?eid=123170297765140) -> Sound Coordinator, Schenectady Light Opera Company ( http://www.sloctheater.org/ ) -> Technical Advisor, RPI Players _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
