* Craig Ringer (cr...@2ndquadrant.com) wrote: > > The patch https://commitfest.postgresql.org/action/patch_view?id=885 > > (discussion starts here I hope - > > http://www.postgresql.org/message-id/4fe8ca2c.3030...@uptime.jp) > > demonstrates performance problems; LWLOCK_STAT, LOCK_DEBUG and > > DTrace-like approach are slow, unsafe for production use and a bit > > clumsy for using by DBA. > > It's not at all clear to me that a DTrace-like (or perf-based, rather) > approach is unsafe, slow, or unsuitable for production use.
I've certainly had it take production systems down (perf, specifically), so I'd definitely consider it "unsafe". I wouldn't say it's unusable, but it's certainly not what we should have as the end-goal for PG. Thanks, Stephen
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