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mdbx: minor mix result caching inside the get_reasonable_db_maxsize().

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Change-Id: I9763ebb323d4f66e702e07f708e269e2479880ac
This commit is contained in:
Леонид Юрьев (Leonid Yuriev) 2022-03-03 19:53:00 +03:00
parent 8c2efe3aaa
commit 9d8fc7b984
1 changed files with 4 additions and 2 deletions
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6
src/core.c
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@ -11275,10 +11275,12 @@ __cold static intptr_t get_reasonable_db_maxsize(intptr_t *cached_result) {
intptr_t pagesize, total_ram_pages;
if (unlikely(mdbx_get_sysraminfo(&pagesize, &total_ram_pages, nullptr) !=
MDBX_SUCCESS))
return MAX_MAPSIZE32 /* the 32-bit limit is good enough for fallback */;
return *cached_result = MAX_MAPSIZE32 /* the 32-bit limit is good enough
for fallback */
;
if (unlikely((size_t)total_ram_pages * 2 > MAX_MAPSIZE / (size_t)pagesize))
return MAX_MAPSIZE;
return *cached_result = MAX_MAPSIZE;
assert(MAX_MAPSIZE >= (size_t)(total_ram_pages * pagesize * 2));
/* Suggesting should not be more than golden ratio of the size of RAM. */