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Leave space for other objects in shared memory

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This commit is contained in:
Andrew Kane
2024-01-15 19:17:50 -08:00
parent 9d3e4e74df
commit 2f9371516d
1 changed files with 9 additions and 0 deletions
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9
src/hnswbuild.c
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@@ -931,6 +931,7 @@ HnswBeginParallel(HnswBuildState * buildstate, bool isconcurrent, int request)
Snapshot snapshot;
Size esthnswshared;
Size esthnswarea;
Size estother;
HnswShared *hnswshared;
char *hnswarea;
HnswLeader *hnswleader = (HnswLeader *) palloc0(sizeof(HnswLeader));
@@ -961,7 +962,15 @@ HnswBeginParallel(HnswBuildState * buildstate, bool isconcurrent, int request)
/* Estimate size of workspaces */
esthnswshared = ParallelEstimateShared(buildstate->heap, snapshot);
shm_toc_estimate_chunk(&pcxt->estimator, esthnswshared);
/* Leave space for other objects in shared memory */
/* Docker has a default limit of 64 MB for shm_size */
/* which happens to be the default value of maintenance_work_mem */
esthnswarea = maintenance_work_mem * 1024L;
estother = 2 * 1024 * 1024;
if (esthnswarea > estother)
esthnswarea -= estother;
shm_toc_estimate_chunk(&pcxt->estimator, esthnswarea);
shm_toc_estimate_keys(&pcxt->estimator, 2);