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Adjusted calculation of shared memory requirements to new

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ARC buffer replacement strategy.

Jan
This commit is contained in:
Jan Wieck
2004-01-15 16:14:26 +00:00
parent cfd7fb7ed4
commit dfdd59e918
3 changed files with 56 additions and 47 deletions
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12
src/backend/storage/buffer/buf_init.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/buffer/buf_init.c,v 1.60 2003/12/20 17:31:21 momjian Exp $
* $PostgreSQL: pgsql/src/backend/storage/buffer/buf_init.c,v 1.61 2004/01/15 16:14:26 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -231,13 +231,19 @@ BufferShmemSize(void)
size += hash_estimate_size(SHMEM_INDEX_SIZE, sizeof(ShmemIndexEnt));
/* size of buffer descriptors */
size += MAXALIGN((NBuffers + 1) * sizeof(BufferDesc));
size += MAXALIGN(NBuffers * sizeof(BufferDesc));
/* size of the shared replacement strategy control block */
size += MAXALIGN(sizeof(BufferStrategyControl));
/* size of the ARC directory blocks */
size += MAXALIGN(NBuffers * 2 * sizeof(BufferStrategyCDB));
/* size of data pages */
size += NBuffers * MAXALIGN(BLCKSZ);
/* size of buffer hash table */
size += hash_estimate_size(NBuffers, sizeof(BufferLookupEnt));
size += hash_estimate_size(NBuffers * 2, sizeof(BufferLookupEnt));
return size;
}