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Merge pull request #50533 from kssenii/add-some-metrics

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Add profile events for fs cache eviction
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Alexey Milovidov 2023-06-04 06:03:29 +03:00 committed by GitHub
commit 640b758ab0
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2 changed files with 16 additions and 1 deletions
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3
src/Common/ProfileEvents.cpp
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@ -381,6 +381,9 @@ The server successfully detected this situation and will download merged part fr
M(CachedWriteBufferCacheWriteBytes, "Bytes written from source (remote fs, etc) to filesystem cache") \
M(CachedWriteBufferCacheWriteMicroseconds, "Time spent writing data into filesystem cache") \
\
M(FilesystemCacheEvictedBytes, "Number of bytes evicted from filesystem cache") \
M(FilesystemCacheEvictedFileSegments, "Number of file segments evicted from filesystem cache") \
\
M(RemoteFSSeeks, "Total number of seeks for async buffer") \
M(RemoteFSPrefetches, "Number of prefetches made with asynchronous reading from remote filesystem") \
M(RemoteFSCancelledPrefetches, "Number of cancelled prefecthes (because of seek)") \

14
src/Interpreters/Cache/FileCache.cpp
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@ -17,6 +17,12 @@
namespace fs = std::filesystem;
namespace ProfileEvents
{
extern const Event FilesystemCacheEvictedBytes;
extern const Event FilesystemCacheEvictedFileSegments;
}
namespace
{
@ -643,7 +649,9 @@ bool FileCache::tryReserve(FileSegment & file_segment, const size_t size)
return PriorityIterationResult::CONTINUE;
}
/// TODO: we can resize if partially downloaded instead.
ProfileEvents::increment(ProfileEvents::FilesystemCacheEvictedFileSegments);
ProfileEvents::increment(ProfileEvents::FilesystemCacheEvictedBytes, segment->range().size());
locked_key.removeFileSegment(segment->offset(), segment->lock());
return PriorityIterationResult::REMOVE_AND_CONTINUE;
}
@ -721,6 +729,10 @@ bool FileCache::tryReserve(FileSegment & file_segment, const size_t size)
chassert(candidate->releasable());
const auto * segment = candidate->file_segment.get();
ProfileEvents::increment(ProfileEvents::FilesystemCacheEvictedFileSegments);
ProfileEvents::increment(ProfileEvents::FilesystemCacheEvictedBytes, segment->range().size());
locked_key->removeFileSegment(segment->offset(), segment->lock());
segment->getQueueIterator()->remove(cache_lock);