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add metrics MergeTreeMetadataCacheSize

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This commit is contained in:
taiyang-li 2022-01-10 12:20:39 +08:00
parent 5bff268f84
commit 3d409a4526
3 changed files with 19 additions and 0 deletions
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11
src/Interpreters/AsynchronousMetrics.cpp
View File

@ -12,6 +12,7 @@
#include <Storages/MarkCache.h>
#include <Storages/StorageMergeTree.h>
#include <Storages/StorageReplicatedMergeTree.h>
#include <Storages/MergeTree/MergeTreeMetadataCache.h>
#include <IO/UncompressedCache.h>
#include <IO/MMappedFileCache.h>
#include <IO/ReadHelpers.h>
@ -573,6 +574,15 @@ void AsynchronousMetrics::update(std::chrono::system_clock::time_point update_ti
}
}
#if USE_ROCKSDB
{
if (auto metadata_cache = getContext()->getMergeTreeMetadataCache())
{
new_values["MergeTreeMetadataCacheSize"] = metadata_cache->getEstimateNumKeys();
}
}
#endif
#if USE_EMBEDDED_COMPILER
{
if (auto * compiled_expression_cache = CompiledExpressionCacheFactory::instance().tryGetCache())
@ -583,6 +593,7 @@ void AsynchronousMetrics::update(std::chrono::system_clock::time_point update_ti
}
#endif
new_values["Uptime"] = getContext()->getUptimeSeconds();
/// Process process memory usage according to OS

7
src/Storages/MergeTree/MergeTreeMetadataCache.cpp
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@ -61,6 +61,13 @@ void MergeTreeMetadataCache::getByPrefix(const String & prefix, Strings & keys,
ProfileEvents::increment(ProfileEvents::MergeTreeMetadataCacheSeek);
}
uint64_t MergeTreeMetadataCache::getEstimateNumKeys() const
{
uint64_t keys = 0;
rocksdb->GetAggregatedIntProperty("rocksdb.estimate-num-keys", &keys);
return keys;
}
void MergeTreeMetadataCache::shutdown()
{
rocksdb->Close();

1
src/Storages/MergeTree/MergeTreeMetadataCache.h
View File

@ -28,6 +28,7 @@ public:
Status del(const String & key);
Status get(const String & key, String & value);
void getByPrefix(const String & prefix, Strings & keys, Strings & values);
uint64_t getEstimateNumKeys() const;
void shutdown();
private: