Create asynchronous_metrics_descr.md

content/en/altinity-kb-setup-and-maintenance/asynchronous_metrics_descr.md

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+---
+title: "Description of asynchronous_metrics"
+linkTitle: "Description of asynchronous_metrics"
+weight: 100
+description: >-
+     Description of asynchronous_metrics
+---
+
+# Description of asynchronous_metrics
+
+```
+CompiledExpressionCacheCount    -- number or compiled cached expression (if CompiledExpressionCache is enabled)
+
+jemalloc -- parameters of jemalloc allocator, they are not very useful, and not interesting
+
+MarkCacheBytes / MarkCacheFiles  -- there are cache for .mrk files (default size is 5GB), you can see is it use all 5GB or not
+
+MemoryCode  -- how much memory allocated for ClickHouse executable 
+
+MemoryDataAndStack -- virtual memory allocated for data and stack
+
+MemoryResident  -- real memory used by ClickHouse ( the same as top RES/RSS)
+
+MemoryShared   -- shared memory used by ClickHouse
+
+MemoryVirtual  -- virtual memory used by ClickHouse ( the same as top VIRT)
+
+NumberOfDatabases
+
+NumberOfTables
+
+ReplicasMaxAbsoluteDelay -- important parameter - replica max absolute delay in seconds
+
+ReplicasMaxRelativeDelay -- replica max relative delay (from other replicas) in seconds
+
+ReplicasMaxInsertsInQueue  -- max number of parts to fetch for a single Replicated table
+
+ReplicasSumInsertsInQueue  -- sum of parts to fetch for all Replicated tables
+
+ReplicasMaxMergesInQueue  -- max number of merges in queue for a single Replicated table
+
+ReplicasSumMergesInQueue  -- total number of merges in queue for all Replicated tables
+
+ReplicasMaxQueueSize -- max number of tasks  for a single Replicated table 
+
+ReplicasSumQueueSize -- total number of tasks in replication queue
+
+UncompressedCacheBytes/UncompressedCacheCells  -- allocated memory for uncompressed cache (disabled by default)
+
+Uptime     -- uptime seconds
+```