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Bug 1142269 - Auto-vacuum the DOM Cache database; r=bkelly

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It's easiest if we use auto_vaccum for now.  In the future if this
proves to be insufficient we can look into more sophisticated
vacuuming strategies.
This commit is contained in:
Ehsan Akhgari 2015-03-11 17:59:11 -04:00
parent 988454ac8a
commit acab4ce118
1 changed files with 11 additions and 2 deletions
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13
dom/cache/DBSchema.cpp vendored
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@ -20,8 +20,8 @@ namespace dom {
namespace cache {
const int32_t DBSchema::kMaxWipeSchemaVersion = 2;
const int32_t DBSchema::kLatestSchemaVersion = 2;
const int32_t DBSchema::kMaxWipeSchemaVersion = 3;
const int32_t DBSchema::kLatestSchemaVersion = 3;
const int32_t DBSchema::kMaxEntriesPerStatement = 255;
using mozilla::void_t;
@ -41,6 +41,9 @@ DBSchema::CreateSchema(mozIStorageConnection* aConn)
"PRAGMA journal_mode = TRUNCATE; "
#endif
"PRAGMA foreign_keys = ON; "
// Enable auto-vaccum but in incremental mode in order to avoid doing a lot
// of work at the end of each transaction.
"PRAGMA auto_vacuum = INCREMENTAL; "
// Note, the default encoding of UTF-8 is preferred. mozStorage does all
// the work necessary to convert UTF-16 nsString values for us. We don't
@ -56,6 +59,12 @@ DBSchema::CreateSchema(mozIStorageConnection* aConn)
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
if (schemaVersion == kLatestSchemaVersion) {
// We already have the correct schema, so just do an incremental vaccum and
// get started.
rv = aConn->ExecuteSimpleSQL(NS_LITERAL_CSTRING(
"PRAGMA incremental_vacuum;"));
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
return rv;
}