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/*-
* Copyright (c) 2008-2012 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
#include "wt_internal.h"
/*
* __wt_lsm_stat_init --
* Initialize a LSM statistics structure.
*/
int
__wt_lsm_stat_init(
WT_SESSION_IMPL *session, WT_LSM_TREE *lsm_tree, uint32_t flags)
{
WT_CURSOR *stat_cursor;
WT_DECL_ITEM(uribuf);
WT_DECL_RET;
WT_LSM_CHUNK *chunk;
const char *cfg[] = API_CONF_DEFAULTS(
session, open_cursor, "statistics_fast=on");
const char *disk_cfg[] = API_CONF_DEFAULTS(session,
open_cursor, "checkpoint=WiredTigerCheckpoint,statistics_fast=on");
const char *desc, *pvalue;
int i;
uint64_t value;
WT_UNUSED(flags);
WT_ERR(__wt_scr_alloc(session, 0, &uribuf));
/*
* TODO: Make a copy of the stat fields so the stat cursor gets a
* consistent view? If so should the copy belong to the stat cursor?
*/
/* Clear the statistics we are about to recalculate. */
WT_STAT_SET(lsm_tree->stats, bloom_page_read, 0);
WT_STAT_SET(lsm_tree->stats, bloom_page_evict, 0);
WT_STAT_SET(lsm_tree->stats, bloom_count, 0);
WT_STAT_SET(lsm_tree->stats, bloom_size, 0);
WT_STAT_SET(lsm_tree->stats, page_evict, 0);
WT_STAT_SET(lsm_tree->stats, page_evict_fail, 0);
WT_STAT_SET(lsm_tree->stats, page_read, 0);
WT_STAT_SET(lsm_tree->stats, page_write, 0);
WT_STAT_SET(lsm_tree->stats, lsm_generation_max, 0);
/* Hold the LSM lock so that we can safely walk through the chunks. */
__wt_readlock(session, lsm_tree->rwlock);
/* Set the stats for this run. */
WT_STAT_SET(lsm_tree->stats, lsm_chunk_count, lsm_tree->nchunks);
for (i = 0; i < lsm_tree->nchunks; i++) {
chunk = lsm_tree->chunk[i];
if (chunk->generation >
(uint32_t)WT_STAT(lsm_tree->stats, lsm_generation_max))
WT_STAT_SET(lsm_tree->stats,
lsm_generation_max, chunk->generation);
/*
* LSM chunk reads happen from a checkpoint, so get the
* statistics for a checkpoint if one exists.
*/
WT_ERR(__wt_buf_fmt(
session, uribuf, "statistics:%s", chunk->uri));
ret = __wt_curstat_open(session, uribuf->data,
F_ISSET(chunk, WT_LSM_CHUNK_ONDISK) ? disk_cfg : cfg,
&stat_cursor);
/*
* XXX kludge: we may have an empty chunk where no checkpoint
* was written. If so, try to open the ordinary handle on that
* chunk instead.
*/
if (ret == WT_NOTFOUND && F_ISSET(chunk, WT_LSM_CHUNK_ONDISK))
ret = __wt_curstat_open(
session, uribuf->data, cfg, &stat_cursor);
WT_ERR(ret);
stat_cursor->set_key(stat_cursor, WT_STAT_DSRC_PAGE_EVICT_FAIL);
WT_ERR(stat_cursor->search(stat_cursor));
WT_ERR(stat_cursor->get_value(
stat_cursor, &desc, &pvalue, &value));
WT_STAT_INCRV(lsm_tree->stats, page_evict_fail, value);
stat_cursor->set_key(stat_cursor, WT_STAT_DSRC_PAGE_EVICT);
WT_ERR(stat_cursor->search(stat_cursor));
WT_ERR(stat_cursor->get_value(
stat_cursor, &desc, &pvalue, &value));
WT_STAT_INCRV(lsm_tree->stats, page_evict, value);
stat_cursor->set_key(stat_cursor, WT_STAT_DSRC_PAGE_READ);
WT_ERR(stat_cursor->search(stat_cursor));
WT_ERR(stat_cursor->get_value(
stat_cursor, &desc, &pvalue, &value));
WT_STAT_INCRV(lsm_tree->stats, page_read, value);
stat_cursor->set_key(stat_cursor, WT_STAT_DSRC_PAGE_WRITE);
WT_ERR(stat_cursor->search(stat_cursor));
WT_ERR(stat_cursor->get_value(
stat_cursor, &desc, &pvalue, &value));
WT_STAT_INCRV(lsm_tree->stats, page_write, value);
WT_ERR(stat_cursor->close(stat_cursor));
if (!F_ISSET(chunk, WT_LSM_CHUNK_BLOOM))
continue;
WT_STAT_INCR(lsm_tree->stats, bloom_count);
WT_STAT_INCRV(lsm_tree->stats, bloom_size,
(chunk->count * lsm_tree->bloom_bit_count) / 8);
WT_ERR(__wt_buf_fmt(
session, uribuf, "statistics:%s", chunk->bloom_uri));
WT_ERR(__wt_curstat_open(session, uribuf->data,
cfg, &stat_cursor));
stat_cursor->set_key(stat_cursor, WT_STAT_DSRC_PAGE_EVICT);
WT_ERR(stat_cursor->search(stat_cursor));
WT_ERR(stat_cursor->get_value(
stat_cursor, &desc, &pvalue, &value));
WT_STAT_INCRV(lsm_tree->stats, page_evict, value);
WT_STAT_INCRV(lsm_tree->stats, bloom_page_evict, value);
stat_cursor->set_key(stat_cursor, WT_STAT_DSRC_PAGE_EVICT_FAIL);
WT_ERR(stat_cursor->search(stat_cursor));
WT_ERR(stat_cursor->get_value(
stat_cursor, &desc, &pvalue, &value));
WT_STAT_INCRV(lsm_tree->stats, page_evict_fail, value);
stat_cursor->set_key(stat_cursor, WT_STAT_DSRC_PAGE_READ);
WT_ERR(stat_cursor->search(stat_cursor));
WT_ERR(stat_cursor->get_value(
stat_cursor, &desc, &pvalue, &value));
WT_STAT_INCRV(lsm_tree->stats, page_read, value);
WT_STAT_INCRV(lsm_tree->stats, bloom_page_read, value);
stat_cursor->set_key(stat_cursor, WT_STAT_DSRC_PAGE_WRITE);
WT_ERR(stat_cursor->search(stat_cursor));
WT_ERR(stat_cursor->get_value(
stat_cursor, &desc, &pvalue, &value));
WT_STAT_INCRV(lsm_tree->stats, page_write, value);
WT_ERR(stat_cursor->close(stat_cursor));
}
err: __wt_rwunlock(session, lsm_tree->rwlock);
__wt_scr_free(&uribuf);
return (ret);
}
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