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What is the recommended batch size for SqlBulkCopy?
But when I tested for batch sizes between 100 and 10,000, I found that 500 was the optimal value for my application. The 500 value for SqlBulkCopy. BatchSize is also recommended here.
What is BatchSize in SQL?
Remarks. A batch is complete when BatchSize rows have been processed or there are no more rows to send to the destination data source. If UseInternalTransaction is in effect, each batch of rows is inserted as a separate transaction. The BatchSize property can be set at any time.
What is batch size in database?
Batch size is the maximum number of write operations to include in a batch. When a transaction ends, all batches that did not exceed the batch size are also run. For example, assume a batch size of 100.
Is BigQuery free?
In addition, BigQuery has free operations and a free usage tier. Each project that you create has a billing account attached to it. Any charges incurred by BigQuery jobs run in the project are billed to the attached billing account. BigQuery storage charges are also billed to the attached billing account.
What should the batch size be for bulk load?
The optimal batch size for bulk load operations involves trade-offs between throughput, data space utilization, concurrency, and transaction log space (FULL recovery model). To avoid excessive unused space with bulk load context, adjust the batch size when possible such that data are loaded in multiples of the 64K extent size.
Which is the best batch size for idatareader?
Using a custom IDataReader, it parses flat files and inserts them into a database using SQLBulkCopy. A typical file has about 6M qualified rows, averaging 5 columns of decimal and short text, about 30 bytes per row. Given this scenario, I found a batch size of 5,000 to be the best compromise of speed and memory consumption.
Which is faster 5000 or 500 batch sizes?
I found 5000 to be 2.5x faster, on average, than 500. Inserting the 6 million rows takes about 30 seconds with a batch size of 5,000 and about 80 seconds with batch size of 500. 10,000 was not measurably faster.
What happens when you use a low batch size?
Using a very low batch size can slow performance if it results in sending many partially filled packets to the server. For example, calling bcp_batch after every bcp_sendrow causes each row to be sent in a separate packet and, unless the rows are very large, wastes space in each packet.