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u3: adds u3_lmdb_stat() for printing env info

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This commit is contained in:
Joe Bryan 2021-03-15 18:18:32 -07:00
parent a8437da8c1
commit 3ee8d583b1
2 changed files with 53 additions and 0 deletions
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6
pkg/urbit/include/vere/db/lmdb.h
View File

@ -16,6 +16,12 @@
void
u3_lmdb_exit(MDB_env* env_u);
/* u3_lmdb_stat(): print env stats.
*/
void
u3_lmdb_stat(MDB_env* env_u, FILE* fil_u);
/* u3_lmdb_gulf(): read first and last event numbers.
*/
c3_o

47
pkg/urbit/vere/db/lmdb.c
View File

@ -1,6 +1,10 @@
/* vere/db/lmdb.c
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <lmdb.h>
#include "c/portable.h"
@ -79,6 +83,49 @@ u3_lmdb_exit(MDB_env* env_u)
mdb_env_close(env_u);
}
/* u3_lmdb_stat(): print env stats.
*/
void
u3_lmdb_stat(MDB_env* env_u, FILE* fil_u)
{
size_t siz_i;
fprintf(fil_u, "lmdb info:\n");
{
MDB_stat mst_u;
MDB_envinfo mei_u;
(void)mdb_env_stat(env_u, &mst_u);
(void)mdb_env_info(env_u, &mei_u);
fprintf(fil_u, " map size: %zu\n", mei_u.me_mapsize);
fprintf(fil_u, " page size: %u\n", mst_u.ms_psize);
fprintf(fil_u, " max pages: %zu\n", mei_u.me_mapsize / mst_u.ms_psize);
fprintf(fil_u, " number of pages used: %zu\n", mei_u.me_last_pgno+1);
fprintf(fil_u, " last transaction ID: %zu\n", mei_u.me_last_txnid);
fprintf(fil_u, " max readers: %u\n", mei_u.me_maxreaders);
fprintf(fil_u, " number of readers used: %u\n", mei_u.me_numreaders);
siz_i = mst_u.ms_psize * (mei_u.me_last_pgno+1);
}
{
c3_i fid_i;
struct stat sat_u;
mdb_env_get_fd(env_u, &fid_i);
fstat(fid_i, &sat_u);
if ( siz_i != sat_u.st_size ) {
fprintf(fil_u, "MISMATCH:\n");
}
fprintf(fil_u, " file size (page): %zu\n", siz_i);
fprintf(fil_u, " file size (stat): %jd\n", (intmax_t)sat_u.st_size);
}
}
/* u3_lmdb_gulf(): read first and last event numbers.
*/
c3_o