</term>

<listitem>

<para>

Sets the maximum degree of parallelism for an individual parallel

operation. Note that the requested number of workers may not actually

be available at runtime. Parallel workers are taken from the pool

of processes established by <xref linkend="guc-max-worker-processes">.

Sets the maximum number of workers that can be started for an

individual parallel operation. Parallel workers are taken from the

pool of processes established by

<xref linkend="guc-max-worker-processes">. Note that the requested

number of workers may not actually be available at runtime. If this

occurs, the plan will run with fewer workers than expected, which may

be inefficient. The default value is 2. Setting this value to 0

disables parallel query.

</para>

</listitem>

</varlistentry>

Costdisable_cost=1.0e10;

intmax_parallel_degree=0;

intmax_parallel_degree=2;

boolenable_seqscan= true;

boolenable_indexscan= true;

},

&max_parallel_degree,

0,0,MAX_BACKENDS,

2,0,MAX_BACKENDS,

NULL,NULL,NULL

},

#effective_io_concurrency = 1# 1-1000; 0 disables prefetching

#max_worker_processes = 8

#max_parallel_degree =0# max number of worker processes per node

#max_parallel_degree =2# max number of worker processes per node

#old_snapshot_threshold = -1# 1min-60d; -1 disables; 0 is immediate

# (change requires restart)

#backend_flush_after = 0# 0 disables,