On 09/10/2013 08:20 AM, Andres Freund wrote:
A backtrace for this would be useful. Alternatively you could recompile postgres using -fno-omit-frame-pointer in CFLAGS and use perf record -g.
It's using a custom build, so this should be doable.
Any chance you have older prepared xacts, older sessions or something like that around? I'd expect heap_prune* to be present in workloads that spend significant time in heap_hot_search_buffer...
Not sure about prepared transactions. There are certainly probably old prepared statements around, and long running transactions alongside this one.
cheers andrew -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
