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Loop thru all DBs and show their stats

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This is quick and dirty, should be integrated into mdb_stat.
This commit is contained in:
Howard Chu 2012-08-16 10:25:40 -07:00
parent d53644f682
commit f114fec545
1 changed files with 82 additions and 0 deletions
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82
libraries/libmdb/mdb_stata.c Normal file
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/* mdb_stat.c - memory-mapped database status tool */
/*
* Copyright 2011 Howard Chu, Symas Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mdb.h"
int main(int argc,char * argv[])
{
int rc;
MDB_env *env;
MDB_txn *txn;
MDB_dbi dbi;
MDB_stat mst;
MDB_cursor *cursor;
MDB_val key;
char *envname = argv[1];
rc = mdb_env_create(&env);
mdb_env_set_maxdbs(env, 4);
rc = mdb_env_open(env, envname, MDB_RDONLY, 0);
if (rc) {
printf("mdb_env_open failed, error %d\n", rc);
exit(1);
}
rc = mdb_txn_begin(env, NULL, 1, &txn);
if (rc) {
printf("mdb_txn_begin failed, error %d\n", rc);
exit(1);
}
rc = mdb_open(txn, NULL, 0, &dbi);
if (rc) {
printf("mdb_open failed, error %d\n", rc);
exit(1);
}
rc = mdb_stat(txn, dbi, &mst);
printf("Page size: %u\n", mst.ms_psize);
printf("Tree depth: %u\n", mst.ms_depth);
printf("Branch pages: %zu\n", mst.ms_branch_pages);
printf("Leaf pages: %zu\n", mst.ms_leaf_pages);
printf("Overflow pages: %zu\n", mst.ms_overflow_pages);
printf("Entries: %zu\n", mst.ms_entries);
rc = mdb_cursor_open(txn, dbi, &cursor);
while ((rc = mdb_cursor_get(cursor, &key, NULL, MDB_NEXT)) == 0) {
char *str = malloc(key.mv_size+1);
MDB_dbi db2;
memcpy(str, key.mv_data, key.mv_size);
str[key.mv_size] = '\0';
printf("\n%s\n", str);
rc = mdb_open(txn, str, 0, &db2);
if (rc) break;
free(str);
rc = mdb_stat(txn, db2, &mst);
printf("Tree depth: %u\n", mst.ms_depth);
printf("Branch pages: %zu\n", mst.ms_branch_pages);
printf("Leaf pages: %zu\n", mst.ms_leaf_pages);
printf("Overflow pages: %zu\n", mst.ms_overflow_pages);
printf("Entries: %zu\n", mst.ms_entries);
mdb_close(env, db2);
}
mdb_cursor_close(cursor);
mdb_close(env, dbi);
mdb_txn_abort(txn);
mdb_env_close(env);
return 0;
}