The last CFbot failure was on pg_upgrade/002_pg_upgrade and doesn't seem related to the patch.
# Failed test 'regression tests pass' # at C:/cirrus/src/bin/pg_upgrade/t/002_pg_upgrade.pl line 212. # got: '256' # expected: '0' # Looks like you failed 1 test of 18.
Given that the patch grew a bit in complexity and features, I've tried to reduce it to a minimum to make reviewing easier. The goal is to keep the scope focused for a first version while additional features and changes could be handled afterwards.
For this version: - Trace context can be propagated through SQLCommenter - Sampling decision uses either a global sampling rate or on SQLCommenter's sampled flag - We generate spans for Planner, ExecutorRun and ExecutorFinish
What was put on hold for now: - Generate spans from planstate. This means we don't need the change in instrument.h to track the start of a node for the first version. - Generate spans for parallel processes - Using a GUC variable to propagate trace context - Filtering sampling on queryId
With this, the current patch provides the core to: - Generate, store and export spans with basic buffer management (drop old spans when full or drop new spans when full) - Keep variable strings in a separate file (a la pg_stat_statements) - Track tracing state and top spans across nested execution levels
Thoughts on this approach?
On Mon, Jan 22, 2024 at 7:45 AM Peter Smith <smithpb2250@gmail.com> wrote: > > 2024-01 Commitfest. > > Hi, This patch has a CF status of "Needs Review" [1], but it seems > there were CFbot test failures last time it was run [2]. Please have a > look and post an updated version if necessary. > > ====== > [1] https://commitfest.postgresql.org/46/4456/ > [2] https://cirrus-ci.com/task/5581154296791040 > > Kind Regards, > Peter Smith.