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Venki Korukanti c236101d4c [SPARK-36236][SS] Additional metrics for RocksDB based state store implementation 
### What changes were proposed in this pull request?

Proposing adding new metrics to `customMetrics` under the `stateOperators` in `StreamingQueryProgress` event These metrics help have better visibility into the RocksDB based state store in streaming jobs. For full details of metrics, refer to https://issues.apache.org/jira/browse/SPARK-36236.

### Why are the changes needed?

Current metrics available for the RockDB state store, do not provide observability into many operations such as how much time is spent by the RocksDB in compaction and what is the cache hit ratio. These metrics help compare performance differences in state store operations between slow and fast microbatches .

### Does this PR introduce _any_ user-facing change?

No

### How was this patch tested?

Unittests

Closes #33455 from vkorukanti/rocksdb-metrics.

Authored-by: Venki Korukanti <venki.korukanti@gmail.com>
Signed-off-by: Liang-Chi Hsieh <viirya@gmail.com>
(cherry picked from commit eb4d1c0332)
Signed-off-by: Liang-Chi Hsieh <viirya@gmail.com>
2021-07-28 12:51:56 -07:00
..
catalyst [SPARK-36229][SQL] conv() inconsistently handles invalid strings with more than 64 invalid characters and return wrong value on overflow 2021-07-29 00:19:19 +08:00
core [SPARK-36236][SS] Additional metrics for RocksDB based state store implementation 2021-07-28 12:51:56 -07:00
hive [SPARK-36312][SQL] ParquetWriterSupport.setSchema should check inner field 2021-07-28 13:52:40 +08:00
hive-thriftserver [SPARK-36179][SQL] Support TimestampNTZType in SparkGetColumnsOperation 2021-07-20 09:49:25 +09:00
create-docs.sh [SPARK-34010][SQL][DODCS] Use python3 instead of python in SQL documentation build 2021-01-05 19:48:10 +09:00
gen-sql-api-docs.py [SPARK-34747][SQL][DOCS] Add virtual operators to the built-in function document 2021-03-19 10:19:26 +09:00
gen-sql-config-docs.py [SPARK-32194][PYTHON] Use proper exception classes instead of plain Exception 2021-05-26 11:54:40 +09:00
gen-sql-functions-docs.py
mkdocs.yml
README.md

README.md

Spark SQL

This module provides support for executing relational queries expressed in either SQL or the DataFrame/Dataset API.

Spark SQL is broken up into four subprojects:

  • Catalyst (sql/catalyst) - An implementation-agnostic framework for manipulating trees of relational operators and expressions.
  • Execution (sql/core) - A query planner / execution engine for translating Catalyst's logical query plans into Spark RDDs. This component also includes a new public interface, SQLContext, that allows users to execute SQL or LINQ statements against existing RDDs and Parquet files.
  • Hive Support (sql/hive) - Includes extensions that allow users to write queries using a subset of HiveQL and access data from a Hive Metastore using Hive SerDes. There are also wrappers that allow users to run queries that include Hive UDFs, UDAFs, and UDTFs.
  • HiveServer and CLI support (sql/hive-thriftserver) - Includes support for the SQL CLI (bin/spark-sql) and a HiveServer2 (for JDBC/ODBC) compatible server.

Running ./sql/create-docs.sh generates SQL documentation for built-in functions under sql/site, and SQL configuration documentation that gets included as part of configuration.md in the main docs directory.