From: Robert Haas <rhaas@postgresql.org>
Date: Wed, 28 Feb 2018 16:46:26 +0000 (-0500)
Subject: Document LWTRANCHE_PARALLEL_HASH_JOIN.
X-Git-Tag: REL_11_BETA1~695
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=73797b7884ee1722127f27ecfcede99367139dc0;p=thirdparty%2Fpostgresql.git

Document LWTRANCHE_PARALLEL_HASH_JOIN.

Thomas Munro

Discussion: http://postgr.es/m/CAEepm=3g1hhbFzYkR_QT9RmBvsGX4UaeCtX-4Js8OOEMmFeaSQ@mail.gmail.com
---

diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
index 82c015806e3..3bc4de57d5a 100644
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -845,7 +845,7 @@ postgres   27093  0.0  0.0  30096  2752 ?        Ss   11:34   0:00 postgres: ser
 
       <tbody>
        <row>
-        <entry morerows="63"><literal>LWLock</literal></entry>
+        <entry morerows="64"><literal>LWLock</literal></entry>
         <entry><literal>ShmemIndexLock</literal></entry>
         <entry>Waiting to find or allocate space in shared memory.</entry>
        </row>
@@ -1121,6 +1121,11 @@ postgres   27093  0.0  0.0  30096  2752 ?        Ss   11:34   0:00 postgres: ser
          <entry>Waiting to choose the next subplan during Parallel Append plan
          execution.</entry>
         </row>
+        <row>
+         <entry><literal>parallel_hash_join</literal></entry>
+         <entry>Waiting to allocate or exchange a chunk of memory or update
+         counters during Parallel Hash plan execution.</entry>
+        </row>
         <row>
          <entry morerows="9"><literal>Lock</literal></entry>
          <entry><literal>relation</literal></entry>
diff --git a/src/backend/storage/lmgr/lwlock.c b/src/backend/storage/lmgr/lwlock.c
index 233606b4141..a6fda81feb6 100644
--- a/src/backend/storage/lmgr/lwlock.c
+++ b/src/backend/storage/lmgr/lwlock.c
@@ -520,6 +520,7 @@ RegisterLWLockTranches(void)
 						  "shared_tuplestore");
 	LWLockRegisterTranche(LWTRANCHE_TBM, "tbm");
 	LWLockRegisterTranche(LWTRANCHE_PARALLEL_APPEND, "parallel_append");
+	LWLockRegisterTranche(LWTRANCHE_PARALLEL_HASH_JOIN, "parallel_hash_join");
 
 	/* Register named tranches. */
 	for (i = 0; i < NamedLWLockTrancheRequests; i++)