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Add soft_rate_limit stats

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Summary: This diff adds histogram stats for soft_rate_limit stalls. It also renames the old rate_limit stats to hard_rate_limit.

Test Plan: make -j32 check

Reviewers: dhruba, haobo, MarkCallaghan

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D12021
This commit is contained in:
Jim Paton
2013-08-05 18:45:23 -07:00
parent 1d7b4765c3
commit 8e792e5896
2 changed files with 15 additions and 9 deletions
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16
db/db_impl.cc
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@@ -2541,7 +2541,7 @@ Status DBImpl::MakeRoomForWrite(bool force) {
mutex_.Unlock();
uint64_t delayed;
{
StopWatch sw(env_, options_.statistics, RATE_LIMIT_DELAY_COUNT);
StopWatch sw(env_, options_.statistics, HARD_RATE_LIMIT_DELAY_COUNT);
env_->SleepForMicroseconds(1000);
delayed = sw.ElapsedMicros();
}
@@ -2567,11 +2567,15 @@ Status DBImpl::MakeRoomForWrite(bool force) {
// Delay a write when the compaction score for any level is too large.
// TODO: add statistics
mutex_.Unlock();
env_->SleepForMicroseconds(SlowdownAmount(
score,
options_.soft_rate_limit,
options_.hard_rate_limit)
);
{
StopWatch sw(env_, options_.statistics, SOFT_RATE_LIMIT_DELAY_COUNT);
env_->SleepForMicroseconds(SlowdownAmount(
score,
options_.soft_rate_limit,
options_.hard_rate_limit)
);
rate_limit_delay_millis += sw.ElapsedMicros();
}
allow_soft_rate_limit_delay = false;
mutex_.Lock();
} else {