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Better handle 32-bit platforms by limitting database size

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Experimentally, setting the database size to 2GB didn't work.
These values are quite arbitrary, and should probably be settings or
automatically adjusted.
This commit is contained in:
Mayeul Cantan 2022-07-19 13:42:28 +02:00
parent eb33c9a225
commit 702d7e620f
1 changed files with 9 additions and 3 deletions
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12
src/Cache.cpp
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@ -46,10 +46,16 @@ static const std::string_view OLM_ACCOUNT_KEY("olm_account");
static const std::string_view CACHE_FORMAT_VERSION_KEY("cache_format_version"); static const std::string_view CACHE_FORMAT_VERSION_KEY("cache_format_version");
static const std::string_view CURRENT_ONLINE_BACKUP_VERSION("current_online_backup_version"); static const std::string_view CURRENT_ONLINE_BACKUP_VERSION("current_online_backup_version");
constexpr size_t MAX_RESTORED_MESSAGES = 30'000;
constexpr auto DB_SIZE = 32ULL * 1024ULL * 1024ULL * 1024ULL; // 32 GB
constexpr auto MAX_DBS = 32384UL; constexpr auto MAX_DBS = 32384UL;
#if Q_PROCESSOR_WORDSIZE == 8 // 64-bit
constexpr auto DB_SIZE = 32ULL * 1024ULL * 1024ULL * 1024ULL; // 32 GB
constexpr size_t MAX_RESTORED_MESSAGES = 30'000;
#elif Q_PROCESSOR_WORDSIZE == 4 // 32-bit address space limits mmaps
constexpr auto DB_SIZE = 1ULL * 1024ULL * 1024ULL * 1024ULL; // 1 GB
constexpr size_t MAX_RESTORED_MESSAGES = 5'000;
#else
#error unknown word size on target CPU
#endif
constexpr auto BATCH_SIZE = 100; constexpr auto BATCH_SIZE = 100;
//! Cache databases and their format. //! Cache databases and their format.