On Tue, Dec 19, 2017 at 6:38 AM, Thomas Munro <thomas.munro@enterprisedb.com> wrote: > On Fri, Dec 15, 2017 at 1:31 AM, <skaurus@gmail.com> wrote: >> pg_stat_activity says that they all have wait_event_type = IPC, wait_event = >> BtreePage, state = active > > https://www.postgresql.org/message-id/E1ePESn-0005PV-S9%40gemulon.postgresql.org > > The problem is in Parallel Index Scan for btree. The fix will be in > 10.2. One workaround in the meantime would be to disable parallelism > for that query (SET max_parallel_workers_per_gather = 0).
On second thoughts, a more targeted workaround to avoid just these buggy parallel index scans without disabling parallelism in general might be:
