Package com.ocient.jdbc

Class XGProperties

java.lang.Object
com.ocient.jdbc.XGProperties
public final class XGProperties extends Object

  • Field Details

    • MIN_RESULT_SET_BUFFERS_PER_RESPONSE_KEY

      public static final String MIN_RESULT_SET_BUFFERS_PER_RESPONSE_KEY
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    • MAX_RESULT_SET_BUFFERS_PER_RESPONSE_KEY

      public static final String MAX_RESULT_SET_BUFFERS_PER_RESPONSE_KEY
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    • MAX_PARALLEL_TCP_STREAMS_KEY

      public static final String MAX_PARALLEL_TCP_STREAMS_KEY
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    • MAX_SEQUENCED_PARALLEL_TCP_STREAMS_KEY

      public static final String MAX_SEQUENCED_PARALLEL_TCP_STREAMS_KEY
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    • RESULT_SET_BUFFER_QUEUE_DEPTH_KEY

      public static final String RESULT_SET_BUFFER_QUEUE_DEPTH_KEY
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    • SINGLE_TCP_STREAM_READ_AHEAD_KEY

      public static final String SINGLE_TCP_STREAM_READ_AHEAD_KEY
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    • PARALLEL_TCP_STREAM_READ_AHEAD_KEY

      public static final String PARALLEL_TCP_STREAM_READ_AHEAD_KEY
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    • CONNECTION_POOL_ACTIVATION_PERMITS

      public static final int CONNECTION_POOL_ACTIVATION_PERMITS
      The connection activator thread pool is used to activate and establish database connections asynchronously. It uses a core pool size of 1 and an unbounded maximum pool size.

      A semaphore is used to throttle the maximum number of concurrent activation tasks. It uses a fair policy to ensure that all pending tasks have an equal chance of acquiring permits.

    • CONNECTION_POOL_MIN_IDLE_PER_EDNPOINT

      public static final int CONNECTION_POOL_MIN_IDLE_PER_EDNPOINT
      The minimum number of connections to cache per database endpoint. Bursty applications may want to increase this value.

    • CONNECTION_POOL_MIN_EVICTABLE_IDLE_TIME_MILLIS

      public static final Duration CONNECTION_POOL_MIN_EVICTABLE_IDLE_TIME_MILLIS
      Specifies the minimum amount of time that a closed connection must remain idle before it is eligible for eviction.

      This is a soft limit, which means that it does not guarantee that objects will be evicted after the specified time. Instead, it provides a hint to the eviction thread that connections should be evicted if they are idle for longer than the specified time and if the pool size exceeds the maximum size limit.

      It's worth noting that setting a high value for can lead to increased memory usage and decreased performance, as idle objects will remain in the pool for longer periods of time.

    • CONNECTION_POOL_MILLIS_BETWEEN_EVICTION_RUNS

      public static final Duration CONNECTION_POOL_MILLIS_BETWEEN_EVICTION_RUNS
      Specifies the amount of time to wait in between eviction runs.

    • CONNECTION_POOL_NUM_TESTS_PER_EVICTION_RUN

      public static final int CONNECTION_POOL_NUM_TESTS_PER_EVICTION_RUN
      Number of connections to evict per run.

    • PARALLEL_TCP_STREAM_READ_AHEAD

      public static final int PARALLEL_TCP_STREAM_READ_AHEAD
      The maximum number of fetch data requests to queue on the server's network receive buffer when multiple TCP streams are used to fetch results.

    • SINGLE_TCP_STREAM_READ_AHEAD

      public static final int SINGLE_TCP_STREAM_READ_AHEAD
      The maximum number of fetch data requests to queue on the server's network receive buffer when a single TCP stream is used to fetch results.

    • MAX_PARALLEL_TCP_STREAMS

      public static final int MAX_PARALLEL_TCP_STREAMS
      The maximum of number of parallel TCP streams used to issue fetch data requests.

    • MAX_SEQUENCED_PARALLEL_TCP_STREAMS

      public static final int MAX_SEQUENCED_PARALLEL_TCP_STREAMS
      The maximum of number of parallel TCP streams used to issue fetch data requests when streaming a sorted result set.

    • RESULT_SET_BUFFER_QUEUE_DEPTH

      public static final int RESULT_SET_BUFFER_QUEUE_DEPTH
      The maximum of number of result set buffers to hold in memory at any given time.

    • MAX_RESULT_SET_BUFFERS_PER_RESPONSE

      public static final int MAX_RESULT_SET_BUFFERS_PER_RESPONSE
      The maximum of number of result set buffers in each fetch data response.

    • MIN_RESULT_SET_BUFFERS_PER_RESPONSE

      public static final int MIN_RESULT_SET_BUFFERS_PER_RESPONSE
      The minimum of number of result set buffers in each fetch data response.

  • Method Details

    • getDefaultStreamProperties

      public static Map<String,Integer> getDefaultStreamProperties()
      Returns the default values for all stream properties.

    • getRTAStreamProperties

      public static Map<String,Integer> getRTAStreamProperties()
      Returns the default stream properties for RTA workloads.

    • validateStreamProperties

      public static void validateStreamProperties(Map<String,Integer> properties)
      Validate the given stream properties.