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| author | Michael Cahill <michael.cahill@wiredtiger.com> | 2012-10-25 15:56:26 +1100 |
|---|---|---|
| committer | Michael Cahill <michael.cahill@wiredtiger.com> | 2012-10-25 15:56:26 +1100 |
| commit | 6a5f4d3af0a06dfa51bc84176480f4c3dc637db1 (patch) | |
| tree | 97153dc589f0e678dea4d38048a6a639f449a13a | |
| parent | 327bbcc5543d14fef8350dbe7662e0e46b3fc5db (diff) | |
| download | mongo-6a5f4d3af0a06dfa51bc84176480f4c3dc637db1.tar.gz | |
Skew eviction (much) further in favor of leaf pages.
| -rw-r--r-- | src/btree/bt_evict.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/btree/bt_evict.c b/src/btree/bt_evict.c index dec1651dd36..dd12850484e 100644 --- a/src/btree/bt_evict.c +++ b/src/btree/bt_evict.c @@ -21,6 +21,9 @@ static int __evict_worker(WT_SESSION_IMPL *); * number of pages from each file's in-memory tree for each page we evict. */ #define WT_EVICT_GROUP 30 /* Consider N pages as LRU candidates */ +#define WT_EVICT_INT_SKEW (1<<20) /* Prefer leaf pages over internal + pages by this many increments of the + read generation. */ #define WT_EVICT_WALK_PER_FILE 5 /* Pages to visit per file */ #define WT_EVICT_WALK_BASE 50 /* Pages tracked across file visits */ #define WT_EVICT_WALK_INCR 100 /* Pages added each walk */ @@ -820,8 +823,8 @@ __evict_lru_cmp(const void *a, const void *b) a_lru = a_page->read_gen; b_lru = b_page->read_gen; if (a_page->type == WT_PAGE_ROW_INT || a_page->type == WT_PAGE_COL_INT) - a_lru += WT_EVICT_GROUP; + a_lru += WT_EVICT_INT_SKEW; if (b_page->type == WT_PAGE_ROW_INT || b_page->type == WT_PAGE_COL_INT) - b_lru += WT_EVICT_GROUP; + b_lru += WT_EVICT_INT_SKEW; return (a_lru > b_lru ? 1 : (a_lru < b_lru ? -1 : 0)); } |