Re: dsa_allocate() faliure

Hi, I'm also experiencing the problem: dsa_allocate could not find 7 free
pages CONTEXT: parallel worker

I'm running: PostgreSQL 10.5 (Ubuntu 10.5-1.pgdg16.04+1) on
x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 5.4.0-6ubuntu1~16.04.10) 5.4.0
20160609, 64-bit

query plan: (select statement over parent table to many partitions):
select ...
from fa
where c_id in (<ID_LIST>) and
datetime >= '2018/01/01'
and ((dims ? 'p' and dims ? 'mcp')
or (datasource in (FA', 'GA')))
and not datasource = 'm'
GROUP BY datasource, dims ->'ct', dims ->'mcp', dims -> 'p', dims -> 'sp':

Finalize GroupAggregate (cost=31514757.77..31519357.77 rows=40000 width=223)
Group Key: fa.datasource, ((fa.dims -> 'ct'::text)), ((fa.dims ->
'mcp'::text)), ((fa.dims -> 'p'::text)), ((fa.dims -> 'sp'::text))
-> Sort (cost=31514757.77..31515057.77 rows=120000 width=223)
Sort Key: fa.datasource, ((fa.dims -> 'ct'::text)), ((fa.dims
-> 'mcp'::text)), ((fa.dims -> 'p'::text)), ((fa.dims -> 'sp'::text))
-> Gather (cost=31491634.17..31504634.17 rows=120000 width=223)
Workers Planned: 3
-> Partial HashAggregate
(cost=31490634.17..31491634.17 rows=40000 width=223)
Group Key: fa.datasource, (fa.dims ->
'ct'::text), (fa.dims -> 'mcp'::text), (fa.dims -> 'p'::text),
(fa.dims -> 'sp'::text)
-> Result (cost=0.00..31364713.39 rows=5596479 width=175)
-> Append (cost=0.00..31252783.81
rows=5596479 width=659)
-> Parallel Seq Scan on fa
(cost=0.00..0.00 rows=1 width=580)
Filter: ((datetime >=
'2018-01-01 00:00:00+01'::timestamp with time zone) AND
((datasource)::text <> 'M'::text) AND (((dims ? 'p'::text) AND (dims ?
'mcp'::text)) OR ((datasource)::text =
ANY ('{"FA","GA"}'::text[]))) AND (c_id = ANY ('{<ID_LIST>}'::bigint[])))
-> Parallel Bitmap Heap Scan on
fa_10 (cost=1226.36..53641.49 rows=1 width=1290)
Recheck Cond: (datetime >=
'2018-01-01 00:00:00+01'::timestamp with time zone)
Filter: (((datasource)::text <>
'M'::text) AND (((dims ? 'p'::text) AND (dims ? 'mcp'::text)) OR
((datasource)::text = ANY ('<ID_LIST>'::bigint[])))
-> Bitmap Index Scan on
fa_10_rangestart (cost=0.00..1226.36 rows=32259 width=0)
Index Cond: (datetime >=
'2018-01-01 00:00:00+01'::timestamp with time zone)
-> Parallel Seq Scan on fa_105
(cost=0.00..11.99 rows=1 width=580)
Filter: ((datetime >=
'2018-01-01 00:00:00+01'::timestamp with time zone) AND
((datasource)::text <> 'M'::text) AND (((dims ? 'p'::text) AND (dims ?
'mcp'::text)) OR ((datasource)::text =
ANY ('{"FA","GA"}'::text[]))) AND (c_id = ANY ('<ID_LIST>'::bigint[])))
-> Parallel Seq Scan on fa_106
(cost=0.00..11.99 rows=1 width=580)
Filter: ((datetime >=
'2018-01-01 00:00:00+01'::timestamp with time zone) AND
((datasource)::text <> 'M'::text) AND (((dims ? 'p'::text) AND (dims ?
'mcp'::text)) OR ((datasource)::text =
ANY ('{"FA","GA"}'::text[]))) AND (c_id = ANY ('<ID_LIST>..........

--
regards,
Jakub Glapa