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MFC r206178: ibc/db/hash: cap auto-tuned block size

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This commit is contained in:
Andriy Gapon 2010-04-12 21:12:03 +00:00
parent 8eb59aff80
commit d1bec90bbe
2 changed files with 3 additions and 1 deletions
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2
lib/libc/db/hash/hash.c
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@ -293,6 +293,8 @@ init_hash(HTAB *hashp, const char *file, const HASHINFO *info)
if (stat(file, &statbuf))
return (NULL);
hashp->BSIZE = statbuf.st_blksize;
if (hashp->BSIZE > MAX_BSIZE)
hashp->BSIZE = MAX_BSIZE;
hashp->BSHIFT = __log2(hashp->BSIZE);
}

2
lib/libc/db/hash/hash.h
View File

@ -118,7 +118,7 @@ typedef struct htab { /* Memory resident data structure */
/*
* Constants
*/
#define MAX_BSIZE 65536 /* 2^16 */
#define MAX_BSIZE 32768 /* 2^15 but should be 65536 */
#define MIN_BUFFERS 6
#define MINHDRSIZE 512
#define DEF_BUFSIZE 65536 /* 64 K */