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Prevent divison by 0

This commit is contained in:
Ankita Kejriwal 2023-02-24 18:36:55 -08:00
parent 64ac92bd4b
commit 99a1fb52e3
1 changed files with 3 additions and 2 deletions
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5
fdbclient/SpecialKeySpace.actor.cpp
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@ -1076,8 +1076,9 @@ ACTOR Future<bool> checkExclusion(Database db,
// The numerator is the total space in use by FDB that is not immediately reusable.
// This is calculated as: used + free - available = used + free - (free - reusable) = used - reusable.
// The denominator is the total capacity usable by FDB (either used or unused currently).
double finalUnavailableRatio = (totalKvStoreUsedBytes + totalKvStoreFreeBytes - totalKvStoreAvailableBytes) /
(totalKvStoreUsedBytesNonExcluded + totalKvStoreFreeBytesNotExcluded);
double finalUnavailableRatio =
(totalKvStoreUsedBytes + totalKvStoreFreeBytes - totalKvStoreAvailableBytes) /
std::max((totalKvStoreUsedBytesNonExcluded + totalKvStoreFreeBytesNotExcluded), (int64_t)1);
if (ssExcludedCount == ssTotalCount || finalUnavailableRatio > 0.9) {
std::string temp = "ERROR: This exclude may cause the total available space in the cluster to drop below 10%.\n"