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getDatabaseStats: return max filedb depth 

GitOrigin-RevId: 7daf3dbabc342f1947777d0e2d52494edc65270e
This commit is contained in:
Arseny Smirnov 2020-06-02 17:38:26 +03:00
parent c78fbe4bc5
commit 1ba4a5912d
1 changed files with 23 additions and 0 deletions
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23
td/telegram/TdDb.cpp
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@ -524,6 +524,29 @@ Result<string> TdDb::get_stats() {
TRY_STATUS(run_kv_query("ch%"));
TRY_STATUS(run_kv_query("ss%"));
TRY_STATUS(run_kv_query("gr%"));
std::vector<int32> prev(1);
file_db_->pmc().get_by_range("file0", "file:", [&](Slice key, Slice value) {
if (value.substr(0, 2) != "@@") {
return true;
}
auto from = to_integer<td::int32>(key.substr(4));
auto to = to_integer<td::int32>(value.substr(2));
CHECK(from > to);
if (static_cast<size_t>(from) >= prev.size()) {
prev.resize(from + 1);
}
prev[from] = to;
return true;
});
for (size_t i = 1; i < prev.size(); i++) {
if (!prev[i]) {
continue;
}
prev[i] = prev[prev[i]] + 1;
}
sb << "Max filedb depth:" << *std::max_element(prev.begin(), prev.end()) << "\n";
return sb.as_cslice().str();
}