1 /* mdb_stat.c - memory-mapped database status tool */
3 * Copyright 2011-2013 Howard Chu, Symas Corp.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted only as authorized by the OpenLDAP
10 * A copy of this license is available in the file LICENSE in the
11 * top-level directory of the distribution or, alternatively, at
12 * <http://www.OpenLDAP.org/license.html>.
20 static void prstat(MDB_stat *ms)
23 printf(" Page size: %u\n", ms->ms_psize);
25 printf(" Tree depth: %u\n", ms->ms_depth);
26 printf(" Branch pages: %zu\n", ms->ms_branch_pages);
27 printf(" Leaf pages: %zu\n", ms->ms_leaf_pages);
28 printf(" Overflow pages: %zu\n", ms->ms_overflow_pages);
29 printf(" Entries: %zu\n", ms->ms_entries);
32 static void usage(char *prog)
34 fprintf(stderr, "usage: %s dbpath [-e] [-f[f[f]]] [-n] [-a|-s subdb] [-r]\n", prog);
38 int main(int argc, char *argv[])
49 int alldbs = 0, envinfo = 0, envflags = 0, freinfo = 0, rdrinfo = 0;
55 /* -a: print stat of main DB and all subDBs
56 * -s: print stat of only the named subDB
58 * -f: print freelist info
59 * -n: use NOSUBDIR flag on env_open
60 * (default) print stat of only the main DB
62 while ((i = getopt(argc, argv, "aefnrs:")) != EOF) {
76 envflags |= MDB_NOSUBDIR;
91 if (optind != argc - 1)
94 envname = argv[optind];
95 rc = mdb_env_create(&env);
97 if (alldbs || subname) {
98 mdb_env_set_maxdbs(env, 4);
101 rc = mdb_env_open(env, envname, envflags | MDB_RDONLY, 0664);
103 printf("mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc));
106 rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
108 printf("mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc));
113 rc = mdb_env_stat(env, &mst);
114 rc = mdb_env_info(env, &mei);
115 printf("Environment Info\n");
116 printf(" Map address: %p\n", mei.me_mapaddr);
117 printf(" Map size: %zu\n", mei.me_mapsize);
118 printf(" Page size: %u\n", mst.ms_psize);
119 printf(" Max pages: %zu\n", mei.me_mapsize / mst.ms_psize);
120 printf(" Number of pages used: %zu\n", mei.me_last_pgno+1);
121 printf(" Last transaction ID: %zu\n", mei.me_last_txnid);
122 printf(" Max readers: %u\n", mei.me_maxreaders);
123 printf(" Number of readers used: %u\n", mei.me_numreaders);
127 printf("Reader Table Status\n");
128 rc = mdb_reader_list(env, (MDB_msg_func *)fputs, stdout);
134 size_t pages = 0, *iptr;
136 printf("Freelist Status\n");
138 rc = mdb_cursor_open(txn, dbi, &cursor);
140 printf("mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
143 rc = mdb_stat(txn, dbi, &mst);
145 printf("mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
149 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
155 ssize_t i, j, span = 0;
157 for (i = j, prev = 1; --i >= 0; ) {
160 bad = " [bad sequence]";
163 for (; i >= span && iptr[i-span] == pg; span++, pg++) ;
165 printf(" Transaction %zu, %zd pages, maxspan %zd%s\n",
166 *(size_t *)key.mv_data, j, span, bad);
168 for (--j; j >= 0; ) {
170 for (span=1; --j >= 0 && iptr[j] == pg+span; span++) ;
171 printf(span>1 ? " %9zu[%zd]\n" : " %9zu\n",
177 mdb_cursor_close(cursor);
178 printf(" Free pages: %zu\n", pages);
181 rc = mdb_open(txn, subname, 0, &dbi);
183 printf("mdb_open failed, error %d %s\n", rc, mdb_strerror(rc));
187 rc = mdb_stat(txn, dbi, &mst);
189 printf("mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
192 printf("Status of %s\n", subname ? subname : "Main DB");
199 rc = mdb_cursor_open(txn, dbi, &cursor);
201 printf("mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
204 while ((rc = mdb_cursor_get(cursor, &key, NULL, MDB_NEXT_NODUP)) == 0) {
207 if (memchr(key.mv_data, '\0', key.mv_size))
209 str = malloc(key.mv_size+1);
210 memcpy(str, key.mv_data, key.mv_size);
211 str[key.mv_size] = '\0';
212 rc = mdb_open(txn, str, 0, &db2);
213 if (rc == MDB_SUCCESS)
214 printf("Status of %s\n", str);
217 rc = mdb_stat(txn, db2, &mst);
219 printf("mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
225 mdb_cursor_close(cursor);
228 if (rc == MDB_NOTFOUND)
237 return rc ? EXIT_FAILURE : EXIT_SUCCESS;