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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2008-2011 WiredTiger, Inc.
* All rights reserved.
*/
#include "wt_internal.h"
static int __wt_stat_page_col_fix(WT_SESSION_IMPL *, WT_PAGE *);
static int __wt_stat_page_col_rle(WT_SESSION_IMPL *, WT_PAGE *);
static int __wt_stat_page_col_var(WT_SESSION_IMPL *, WT_PAGE *);
static int __wt_stat_page_row_leaf(WT_SESSION_IMPL *, WT_PAGE *, void *);
/*
* __wt_page_stat --
* Stat any Btree page.
*/
int
__wt_page_stat(WT_SESSION_IMPL *session, WT_PAGE *page, void *arg)
{
WT_BTREE_FILE_STATS *stats;
stats = session->btree->fstats;
/*
* All internal pages and overflow pages are trivial, all we track is
* a count of the page type.
*/
switch (page->type) {
case WT_PAGE_COL_FIX:
WT_STAT_INCR(stats, file_col_fix);
WT_RET(__wt_stat_page_col_fix(session, page));
break;
case WT_PAGE_COL_INT:
WT_STAT_INCR(stats, file_col_internal);
break;
case WT_PAGE_COL_RLE:
WT_STAT_INCR(stats, file_col_rle);
WT_RET(__wt_stat_page_col_rle(session, page));
break;
case WT_PAGE_COL_VAR:
WT_STAT_INCR(stats, file_col_variable);
WT_RET(__wt_stat_page_col_var(session, page));
break;
case WT_PAGE_OVFL:
WT_STAT_INCR(stats, file_overflow);
break;
case WT_PAGE_ROW_INT:
WT_STAT_INCR(stats, file_row_internal);
break;
case WT_PAGE_ROW_LEAF:
WT_STAT_INCR(stats, file_row_leaf);
WT_RET(__wt_stat_page_row_leaf(session, page, arg));
break;
WT_ILLEGAL_FORMAT(session);
}
return (0);
}
/*
* __wt_stat_page_col_fix --
* Stat a WT_PAGE_COL_FIX page.
*/
static int
__wt_stat_page_col_fix(WT_SESSION_IMPL *session, WT_PAGE *page)
{
WT_BTREE_FILE_STATS *stats;
WT_COL *cip;
WT_UPDATE *upd;
uint32_t i;
void *cipdata;
stats = session->btree->fstats;
/* Walk the page, counting data items. */
WT_COL_FOREACH(page, cip, i)
if ((upd = WT_COL_UPDATE(page, cip)) == NULL) {
cipdata = WT_COL_PTR(page, cip);
if (cipdata == NULL || WT_FIX_DELETE_ISSET(cipdata))
WT_STAT_INCR(stats, file_item_col_deleted);
else
WT_STAT_INCR(stats, file_item_total_data);
} else
if (WT_UPDATE_DELETED_ISSET(upd))
WT_STAT_INCR(stats, file_item_col_deleted);
else
WT_STAT_INCR(stats, file_item_total_data);
return (0);
}
/*
* __wt_stat_page_col_rle --
* Stat a WT_PAGE_COL_RLE page.
*/
static int
__wt_stat_page_col_rle(WT_SESSION_IMPL *session, WT_PAGE *page)
{
WT_BTREE_FILE_STATS *stats;
WT_COL *cip;
WT_INSERT *ins;
WT_UPDATE *upd;
uint32_t i;
int orig_deleted;
void *cipdata;
stats = session->btree->fstats;
/* Walk the page, counting data items. */
WT_COL_FOREACH(page, cip, i) {
cipdata = WT_COL_PTR(page, cip);
if (cipdata == NULL ||
WT_FIX_DELETE_ISSET(WT_RLE_REPEAT_DATA(cipdata))) {
WT_STAT_INCRV(stats,
file_item_col_deleted,
cipdata == NULL ? 1 : WT_RLE_REPEAT_COUNT(cipdata));
orig_deleted = 1;
} else {
WT_STAT_INCRV(stats,
file_item_total_data, WT_RLE_REPEAT_COUNT(cipdata));
orig_deleted = 0;
}
/*
* Walk the insert list, checking for changes. For each insert
* we find, correct the original count based on its state.
*/
for (ins =
WT_COL_INSERT(page, cip); ins != NULL; ins = ins->next) {
upd = ins->upd;
if (WT_UPDATE_DELETED_ISSET(upd)) {
if (orig_deleted)
continue;
WT_STAT_INCR(stats, file_item_col_deleted);
WT_STAT_DECR(stats, file_item_total_data);
} else {
if (!orig_deleted)
continue;
WT_STAT_DECR(stats, file_item_col_deleted);
WT_STAT_INCR(stats, file_item_total_data);
}
}
}
return (0);
}
/*
* __wt_stat_page_col_var --
* Stat a WT_PAGE_COL_VAR page.
*/
static int
__wt_stat_page_col_var(WT_SESSION_IMPL *session, WT_PAGE *page)
{
WT_BTREE_FILE_STATS *stats;
WT_COL *cip;
WT_UPDATE *upd;
uint32_t i;
void *cipdata;
stats = session->btree->fstats;
/*
* Walk the page, counting regular and overflow data items, and checking
* to be sure any updates weren't deletions. If the item was updated,
* assume it was updated by an item of the same size (it's expensive to
* figure out if it will require the same space or not, especially if
* there's Huffman encoding).
*/
WT_COL_FOREACH(page, cip, i) {
cipdata = WT_COL_PTR(page, cip);
if (cipdata == NULL) {
WT_STAT_INCR(stats, file_item_col_deleted);
continue;
}
switch (__wt_cell_type(cipdata)) {
case WT_CELL_DATA:
case WT_CELL_DATA_OVFL:
upd = WT_COL_UPDATE(page, cip);
if (upd == NULL || !WT_UPDATE_DELETED_ISSET(upd)) {
WT_STAT_INCR(stats, file_item_total_data);
break;
}
/* FALLTHROUGH */
case WT_CELL_DEL:
WT_STAT_INCR(stats, file_item_col_deleted);
break;
WT_ILLEGAL_FORMAT(session);
}
}
return (0);
}
/*
* __wt_stat_page_row_leaf --
* Stat a WT_PAGE_ROW_LEAF page.
*/
static int
__wt_stat_page_row_leaf(WT_SESSION_IMPL *session, WT_PAGE *page, void *arg)
{
WT_BTREE_FILE_STATS *stats;
WT_INSERT *ins;
WT_ROW *rip;
WT_UPDATE *upd;
uint32_t cnt, i;
WT_UNUSED(arg);
stats = session->btree->fstats;
/*
* Stat any K/V pairs inserted into the page before the first from-disk
* key on the page.
*/
cnt = 0;
for (ins = WT_ROW_INSERT_SMALLEST(page); ins != NULL; ins = ins->next)
if (!WT_UPDATE_DELETED_ISSET(ins->upd))
++cnt;
/* Stat the page's K/V pairs. */
WT_ROW_FOREACH(page, rip, i) {
upd = WT_ROW_UPDATE(page, rip);
if (upd == NULL || !WT_UPDATE_DELETED_ISSET(upd))
++cnt;
/* Stat inserted K/V pairs. */
for (ins =
WT_ROW_INSERT(page, rip); ins != NULL; ins = ins->next)
if (!WT_UPDATE_DELETED_ISSET(ins->upd))
++cnt;
}
WT_STAT_INCRV(stats, file_item_total_key, cnt);
WT_STAT_INCRV(stats, file_item_total_data, cnt);
return (0);
}
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