deephaven.perfmon

Tools to obtain internal, Deephaven logs as tables, and tools to analyze the performance of the Deephaven system and Deephaven queries.

metrics_get_counters()[source]

Gets Deephaven performance counter metrics.

Return type

str

Returns

a string of the Deephaven performance counter metrics.

metrics_reset_counters()[source]

Resets Deephaven performance counter metrics.

Return type

None

process_info(proc_id, proc_type, key)[source]

Gets the information for a process.

Parameters
  • proc_id (str) – the process id

  • proc_type (str) – the process type

  • key (str) – the key of the process property

Return type

str

Returns

a string of process information

Raises

DHError

process_info_log()[source]

Returns a static table with process information for the current Deephaven engine process.

Return type

Table

Returns

a Table

Raises

DHError

process_metrics_log()[source]

Returns a table with metrics collected for the current Deephaven engine process.

Return type

Table

Returns

a Table

Raises

DHError

query_operation_performance(eval_number)[source]

Takes in a query evaluation number and returns a view for that query’s individual operation’s performance data.

You can obtain query evaluation numbers, which uniquely identify a query and its subqueries, via the performance data tables obtained from calling query_performance_log() or query_operation_performance_log()

The query operation performance log contains data on how long each individual operation of a query (where(), update(), naturalJoin(), etc., as well as internal functions) takes to execute, and the change in resource consumption while each was executing.

Parameters

eval_number (int) – the evaluation number

Return type

Table

Returns

a table of query operation performance data

Raises

DHError

query_operation_performance_log()[source]

Returns a table with Deephaven performance data for individual subqueries. Performance data for the entire query is available from calling ‘query_performance_log’.

Return type

Table

Returns

a Table

Raises

DHError

query_performance(eval_number)[source]

Takes in a query evaluation number and returns a view for that query’s performance data.

You can obtain query evaluation numbers, which uniquely identify a query and its subqueries, via the performance data tables obtained from calling query_performance_log() or query_operation_performance_log()

The query performance log contains data on how long each query takes to run. Examples of what constitutes one individual query, for performance logging purposes, include:

  • A new command in the console (i.e. type something, then press the return key)

  • A sort, filter, or custom column generated by a UI

  • A call from a client API external application

Parameters

eval_number (int) – the evaluation number

Return type

Table

Returns

a Table of query performance data

Raises

DHError

query_performance_log()[source]

Returns a table with Deephaven query performance data. Performance data for individual sub-operations is available from calling query_operation_performance_log.

Return type

Table

Returns

a Table

Raises

DHError

query_update_performance(eval_number)[source]

Takes in a query evaluation number and returns a view for that query’s update performance data.

You can obtain query evaluation numbers, which uniquely identify a query and its subqueries, via the performance data tables obtained from calling query_performance_log() or query_operation_performance_log()

Parameters

eval_number (int) – the evaluation number

Return type

Table

Returns

a Table of query update performance data

Raises

DHError

query_update_performance_map(eval_number)[source]
Creates multiple tables with performance data for a given query identified by an evaluation number. The tables

are returned in a map with the following String keys: ‘QueryUpdatePerformance’, ‘UpdateWorst’, ‘WorstInterval’, ‘UpdateMostRecent’, ‘UpdateAggregate’, ‘UpdateSummaryStats’.

Parameters

eval_number (int) – the evaluation number

Return type

Dict[str, Table]

Returns

a dict

Raises

DHError

server_state()[source]
Returns a table of basic memory, update graph processor, and GC stats for the current engine process,

sampled on a periodic basis.

Return type

Table

Returns

a table

server_state_log()[source]
Returns a table with memory utilization, update graph processor and garbage collection stats

sampled on a periodic basis.

Return type

Table

Returns

a Table

Raises

DHError

update_performance_log()[source]

Returns a table with Deephaven update performance data.

Returns

a Table

Raises

DHError

Return type

Table