Noah Misch wrote:
> On Mon, Apr 18, 2016 at 03:37:21PM -0300, Alvaro Herrera wrote:
> > The RMT will publish aggregate, unattributed results after the poll
> > closes.
Here are some more detailed results. We got 15 valid replies. One
person voted twice, mentioning the same patches both times in slightly
different order; I considered the second reply only.
"Parallel Query" got many mentions; some of them were specific commits
(such as "parallel infrastructure", "parallel joins", "parallel
aggregates") and others were more generic. For the generic mentions I
just chose a few of the most salient patches, but didn't include either
parallel aggregates nor parallel joins in that list. "LWLock tranches"
and "Freeze Map" also resulted in several commits appearing in the list
below. This distorts the results somewhat. I considered redoing the
results once I noticed the problem, but didn't really want to invest
*too* much time.
I chose to ignore the scariness rating in this tabular report.
┌───────┬──────────────────────────────────────────┬─────────────────────────┬─────────────────────────────────────────────────────────────────────────────┐
│ count │ sha1 │ committer │
subject │
├───────┼──────────────────────────────────────────┼─────────────────────────┼─────────────────────────────────────────────────────────────────────────────┤
│ 8 │ fd31cd265138019dcccc9b5fe53043670898bc9f │ [email protected] │
Don't vacuum all-frozen pages. │
│ 6 │ 924bcf4f16d54c55310b28f77686608684734f42 │ [email protected] │
Create an infrastructure for parallel computation in PostgreSQL. │
│ 5 │ f0661c4e8c44c0ec7acd4ea7c82e85b265447398 │ [email protected] │
Make sequential scans parallel-aware. │
│ 5 │ ee7ca559fcf404f9a3bd99da85c8f4ea9fbc2e92 │ [email protected] │
Add a C API for parallel heap scans. │
│ 3 │ a892234f830e832110f63fc0a2afce2fb21d1584 │ [email protected] │
Change the format of the VM fork to add a second bit per page. │
│ 3 │ 3fc6e2d7f5b652b417fa6937c34de2438d60fa9f │ [email protected] │
Make the upper part of the planner work by generating and comparing Paths. │
│ 3 │ 848ef42bb8c7909c9d7baa38178d4a209906e7c1 │ [email protected] │
Add the "snapshot too old" feature │
│ 2 │ bb140506df605fab58f48926ee1db1f80bdafb59 │ [email protected] │
Phrase full text search. │
│ 2 │ 9cd00c457e6a1ebb984167ac556a9961812a683c │ [email protected] │
Checkpoint sorting and balancing. │
│ 1 │ 3bd909b220930f21d6e15833a17947be749e7fde │ [email protected] │
Add a Gather executor node. │
│ 1 │ c319991bcad02a2e99ddac3f42762b0f6fa8d52a │ [email protected] │
Use separate lwlock tranches for buffer, lock, and predicate lock managers. │
│ 1 │ 1c1a7cbd6a1600c97dfcd9b5dc78a23b5db9bbf6 │ [email protected] │
Sync our copy of the timezone library with IANA release tzcode2016c. │
│ 1 │ 65578341af1ae50e52e0f45e691ce88ad5a1b9b1 │ [email protected] │
Add Generic WAL interface │
│ 1 │ c09b18f21c52cbcf8718d6c267c84fcfea3739a9 │ [email protected] │
Support crosstabview in psql │
│ 1 │ e4106b2528727c4b48639c0e12bf2f70a766b910 │ [email protected] │
postgres_fdw: Push down joins to remote servers. │
│ 1 │ 428b1d6b29ca599c5700d4bc4f4ce4c5880369bf │ [email protected] │
Allow to trigger kernel writeback after a configurable number of writes. │
│ 1 │ 6150a1b08a9fe7ead2b25240be46dddeae9d98e1 │ [email protected] │
Move buffer I/O and content LWLocks out of the main tranche. │
│ 1 │ 48354581a49c30f5757c203415aa8412d85b0f70 │ [email protected] │
Allow Pin/UnpinBuffer to operate in a lockfree manner. │
│ 1 │ 7a542700df25eaf97b794bff63606176433dcdda │ [email protected] │
Create default roles │
│ 1 │ 013ebc0a7b7ea9c1b1ab7a3d4dd75ea121ea8ba7 │ [email protected] │
Microvacuum for GIST │
│ 1 │ 53be0b1add7064ca5db3cd884302dfc3268d884e │ [email protected] │
Provide much better wait information in pg_stat_activity. │
│ 1 │ 0711803775a37e0bf39d7efdd1e34d9d7e640ea1 │ [email protected] │
Use quicksort, not replacement selection, for external sorting. │
│ 1 │ b319356f0e94a6482c726cf4af96597c211d8d6e │ [email protected] │
Migrate PGPROC's backendLock into PGPROC itself, using a new tranche. │
│ 1 │ 11c8669c0cc7abc7a7702594cf13452c378d2517 │ [email protected] │
Add parallel query support functions for assorted aggregates. │
│ 1 │ 2251179e6ad3a865d2f55e1832fab34608fcce43 │ [email protected] │
Migrate replication slot I/O locks into a separate tranche. │
│ 1 │ 45be99f8cd5d606086e0a458c9c72910ba8a613d │ [email protected] │
Support parallel joins, and make related improvements. │
│ 1 │ 7117685461af50f50c03f43e6a622284c8d54694 │ [email protected] │
Implement backup API functions for non-exclusive backups │
│ 1 │ 98a64d0bd713cb89e61bef6432befc4b7b5da59e │ [email protected] │
Introduce WaitEventSet API. │
└───────┴──────────────────────────────────────────┴─────────────────────────┴─────────────────────────────────────────────────────────────────────────────┘
It's clear that Robert is winner, even if you discount the distortion
caused by counting one entry as multiple patches.
--
Álvaro Herrera
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