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Document LWTRANCHE_PARALLEL_HASH_JOIN.

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Thomas Munro

Discussion: http://postgr.es/m/CAEepm=3g1hhbFzYkR_QT9RmBvsGX4UaeCtX-4Js8OOEMmFeaSQ@mail.gmail.com
This commit is contained in:
Robert Haas
2018-02-28 11:46:26 -05:00
parent ce1663cdcd
commit 73797b7884
2 changed files with 7 additions and 1 deletions
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7
doc/src/sgml/monitoring.sgml
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@@ -845,7 +845,7 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
<tbody> <tbody>
<row> <row>
<entry morerows="63"><literal>LWLock</literal></entry> <entry morerows="64"><literal>LWLock</literal></entry>
<entry><literal>ShmemIndexLock</literal></entry> <entry><literal>ShmemIndexLock</literal></entry>
<entry>Waiting to find or allocate space in shared memory.</entry> <entry>Waiting to find or allocate space in shared memory.</entry>
</row> </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 <entry>Waiting to choose the next subplan during Parallel Append plan
execution.</entry> execution.</entry>
</row> </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> <row>
<entry morerows="9"><literal>Lock</literal></entry> <entry morerows="9"><literal>Lock</literal></entry>
<entry><literal>relation</literal></entry> <entry><literal>relation</literal></entry>

1
src/backend/storage/lmgr/lwlock.c
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@@ -520,6 +520,7 @@ RegisterLWLockTranches(void)
"shared_tuplestore"); "shared_tuplestore");
LWLockRegisterTranche(LWTRANCHE_TBM, "tbm"); LWLockRegisterTranche(LWTRANCHE_TBM, "tbm");
LWLockRegisterTranche(LWTRANCHE_PARALLEL_APPEND, "parallel_append"); LWLockRegisterTranche(LWTRANCHE_PARALLEL_APPEND, "parallel_append");
LWLockRegisterTranche(LWTRANCHE_PARALLEL_HASH_JOIN, "parallel_hash_join");
/* Register named tranches. */ /* Register named tranches. */
for (i = 0; i < NamedLWLockTrancheRequests; i++) for (i = 0; i < NamedLWLockTrancheRequests; i++)