Re: Failed to request an autovacuum work-item in silence

Hello,

The patch applies and compiles cleanly, tests pass. The code is working
as well. I was able to check it by simply creating a BRIN index and
filling the table with data forcing the index to request lots of work items:

create table test (a serial, b text);
create index on test using brin (a) with (pages_per_range=1,
autosummarize=true);
insert into test select i, repeat(md5(random()::text), 30) from
generate_series(1, 3000) i;
LOG:  could not request an autovacuum work item "BrinSummarizeRange" for
"test_a_idx"
LOG:  could not request an autovacuum work item "BrinSummarizeRange" for
"test_a_idx"
...

Just couple remarks. I would rename 'requested' variable in
AutoVacuumRequestWork() func to something like 'success' or 'result'.
Because request is something caller does. And I would also rephrase log
message as follows:

   request for autovacuum work item "%s" for "%s" failed

Thanks!

-- 
Ildar Musin
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company