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Added options to modify the operation of the SQLite database (through PRAGMA statements)

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- set cache size (in number of pages)
- set synchronous flag
- set journal mode
This commit is contained in:
chme 2014-06-08 08:25:58 +02:00
parent 17ffdc56ad
commit 46c0239a79
2 changed files with 196 additions and 0 deletions
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3
src/conffile.c
View File

@ -48,6 +48,9 @@ static cfg_opt_t sec_general[] =
CFG_STR("admin_password", NULL, CFGF_NONE),
CFG_STR("logfile", STATEDIR "/log/" PACKAGE ".log", CFGF_NONE),
CFG_STR("db_path", STATEDIR "/cache/" PACKAGE "/songs3.db", CFGF_NONE),
CFG_INT("db_pragma_cache_size", -1, CFGF_NONE),
CFG_STR("db_pragma_journal_mode", NULL, CFGF_NONE),
CFG_INT("db_pragma_synchronous", -1, CFGF_NONE),
CFG_INT_CB("loglevel", E_LOG, CFGF_NONE, &cb_loglevel),
CFG_BOOL("ipv6", cfg_false, CFGF_NONE),
CFG_END()

193
src/db.c
View File

@ -4338,12 +4338,182 @@ db_xprofile(void *notused, const char *pquery, sqlite3_uint64 ptime)
}
#endif
static int
db_pragma_get_cache_size()
{
sqlite3_stmt *stmt;
char *query = "PRAGMA cache_size;";
int ret;
DPRINTF(E_DBG, L_DB, "Running query '%s'\n", query);
ret = db_blocking_prepare_v2(query, -1, &stmt, NULL);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_DB, "Could not prepare statement: %s\n", sqlite3_errmsg(hdl));
sqlite3_free(query);
return 0;
}
ret = db_blocking_step(stmt);
if (ret == SQLITE_DONE)
{
DPRINTF(E_DBG, L_DB, "End of query results\n");
sqlite3_free(query);
return 0;
}
else if (ret != SQLITE_ROW)
{
DPRINTF(E_LOG, L_DB, "Could not step: %s\n", sqlite3_errmsg(hdl));
sqlite3_free(query);
return -1;
}
ret = sqlite3_column_int(stmt, 0);
sqlite3_finalize(stmt);
return ret;
}
static int
db_pragma_set_cache_size(int pages)
{
#define Q_TMPL "PRAGMA cache_size=%d;"
sqlite3_stmt *stmt;
char *query;
int ret;
query = sqlite3_mprintf(Q_TMPL, pages);
DPRINTF(E_DBG, L_DB, "Running query '%s'\n", query);
ret = db_blocking_prepare_v2(query, -1, &stmt, NULL);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_DB, "Could not prepare statement: %s\n", sqlite3_errmsg(hdl));
sqlite3_free(query);
return 0;
}
sqlite3_finalize(stmt);
sqlite3_free(query);
return 0;
}
static char *
db_pragma_set_journal_mode(char *mode)
{
#define Q_TMPL "PRAGMA journal_mode=%s;"
sqlite3_stmt *stmt;
char *query;
int ret;
char *new_mode;
query = sqlite3_mprintf(Q_TMPL, mode);
DPRINTF(E_DBG, L_DB, "Running query '%s'\n", query);
ret = db_blocking_prepare_v2(query, -1, &stmt, NULL);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_DB, "Could not prepare statement: %s\n", sqlite3_errmsg(hdl));
sqlite3_free(query);
return NULL;
}
ret = db_blocking_step(stmt);
if (ret == SQLITE_DONE)
{
DPRINTF(E_DBG, L_DB, "End of query results\n");
sqlite3_free(query);
return NULL;
}
else if (ret != SQLITE_ROW)
{
DPRINTF(E_LOG, L_DB, "Could not step: %s\n", sqlite3_errmsg(hdl));
sqlite3_free(query);
return NULL;
}
new_mode = (char *) sqlite3_column_text(stmt, 0);
sqlite3_finalize(stmt);
sqlite3_free(query);
return new_mode;
#undef Q_TMPL
}
static int
db_pragma_get_synchronous()
{
sqlite3_stmt *stmt;
char *query = "PRAGMA synchronous;";
int ret;
DPRINTF(E_DBG, L_DB, "Running query '%s'\n", query);
ret = db_blocking_prepare_v2(query, -1, &stmt, NULL);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_DB, "Could not prepare statement: %s\n", sqlite3_errmsg(hdl));
sqlite3_free(query);
return 0;
}
ret = db_blocking_step(stmt);
if (ret == SQLITE_DONE)
{
DPRINTF(E_DBG, L_DB, "End of query results\n");
sqlite3_free(query);
return 0;
}
else if (ret != SQLITE_ROW)
{
DPRINTF(E_LOG, L_DB, "Could not step: %s\n", sqlite3_errmsg(hdl));
sqlite3_free(query);
return -1;
}
ret = sqlite3_column_int(stmt, 0);
sqlite3_finalize(stmt);
return ret;
}
static int
db_pragma_set_synchronous(int synchronous)
{
#define Q_TMPL "PRAGMA synchronous=%d;"
sqlite3_stmt *stmt;
char *query;
int ret;
query = sqlite3_mprintf(Q_TMPL, synchronous);
DPRINTF(E_DBG, L_DB, "Running query '%s'\n", query);
ret = db_blocking_prepare_v2(query, -1, &stmt, NULL);
if (ret != SQLITE_OK)
{
DPRINTF(E_LOG, L_DB, "Could not prepare statement: %s\n", sqlite3_errmsg(hdl));
sqlite3_free(query);
return 0;
}
sqlite3_finalize(stmt);
sqlite3_free(query);
return 0;
}
int
db_perthread_init(void)
{
char *errmsg;
int ret;
int cache_size;
char *journal_mode;
int synchronous;
ret = sqlite3_open(db_path, &hdl);
if (ret != SQLITE_OK)
@ -4392,6 +4562,29 @@ db_perthread_init(void)
sqlite3_profile(hdl, db_xprofile, NULL);
#endif
cache_size = cfg_getint(cfg_getsec(cfg, "general"), "db_pragma_cache_size");
if (cache_size > -1)
{
db_pragma_set_cache_size(cache_size);
cache_size = db_pragma_get_cache_size();
DPRINTF(E_DBG, L_DB, "Database cache size in pages: %d\n", cache_size);
}
journal_mode = cfg_getstr(cfg_getsec(cfg, "general"), "db_pragma_journal_mode");
if (journal_mode)
{
journal_mode = db_pragma_set_journal_mode(journal_mode);
DPRINTF(E_DBG, L_DB, "Database journal mode: %s\n", journal_mode);
}
synchronous = cfg_getint(cfg_getsec(cfg, "general"), "db_pragma_synchronous");
if (synchronous > -1)
{
db_pragma_set_synchronous(synchronous);
synchronous = db_pragma_get_synchronous();
DPRINTF(E_DBG, L_DB, "Database synchronous: %d\n", synchronous);
}
return 0;
}