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Diffstat (limited to 'src/backend/postmaster/checkpointer.c')
| -rw-r--r-- | src/backend/postmaster/checkpointer.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c index 8490148a47d..e84e8663e96 100644 --- a/src/backend/postmaster/checkpointer.c +++ b/src/backend/postmaster/checkpointer.c @@ -953,11 +953,14 @@ CheckpointerShmemSize(void) Size size; /* - * Currently, the size of the requests[] array is arbitrarily set equal to - * NBuffers. This may prove too large or small ... + * The size of the requests[] array is arbitrarily set equal to NBuffers. + * But there is a cap of MAX_CHECKPOINT_REQUESTS to prevent accumulating + * too many checkpoint requests in the ring buffer. */ size = offsetof(CheckpointerShmemStruct, requests); - size = add_size(size, mul_size(NBuffers, sizeof(CheckpointerRequest))); + size = add_size(size, mul_size(Min(NBuffers, + MAX_CHECKPOINT_REQUESTS), + sizeof(CheckpointerRequest))); return size; } |