我们有一个每周清理工作，删除超过3个月的ELMAH条目，但是由于语句需要很长时间，因此工作会保持计时。该表没有触发器，没有FK和2个非聚集索引。
DELETE FROM ELMAH_Error where [Application] = 'XXXXX' AND TimeUtc < CONVERT(datetime, '20160422')
在本地，删除13k记录大约需要9秒，在Azure中删除当前15分钟并计数的相同记录数。该实例是一个S3，因此在性能方面不是最好的或最差的，并且它在更复杂的查询上表现得非常好。
这是否真的是预期的删除性能，或者我可以采取哪些措施来改进它？
根据评论中的请求，我正在添加会话信息：
session_id request_id start_time status command sql_handle statement_start_offset statement_end_offset plan_handle database_id user_id connection_id blocking_session_id wait_type wait_time last_wait_type wait_resource open_transaction_count open_resultset_count transaction_id context_info percent_complete estimated_completion_time cpu_time total_elapsed_time scheduler_id task_address reads writes logical_reads text_size language date_format date_first quoted_identifier arithabort ansi_null_dflt_on ansi_defaults ansi_warnings ansi_padding ansi_nulls concat_null_yields_null transaction_isolation_level lock_timeout deadlock_priority row_count prev_error nest_level granted_query_memory executing_managed_code group_id query_hash query_plan_hash statement_sql_handle statement_context_id dop parallel_worker_count external_script_request_id
64 0 2016-07-22 16:00:25.280 suspended DELETE 0x0200000011544C309C7171CC58E181C91A38650CF0B7103A0000000000000000000000000000000000000000 70 230 0x0600060011544C3060702EDD6600000001000000000000000000000000000000000000000000000000000000 6 1 D137311B-80AB-4E17-BC86-DBBEA03244D7 0 IO_COMPLETION 288 IO_COMPLETION 2 1 20682237 0x440031003300370033003100310042002D0038003000410042002D0034004500310037002D0042004300380036002D004400420042004500410030003300320034003400440037 0 0 772 70871 0 0x8092E7FD3A7C2D84 6 32169 103713 2147483647 us_english mdy 7 1 1 1 0 1 1 1 1 2 -1 0 0 0 0 0 0 2000000024 0xE627D5B8AD4C8E22 0x7D10726F72195BFD 0x09009C7171CC58E181C91A38650CF0B7103A0000000000000000000000000000000000000000000000000000 9 1 NULL NULL
waiting_task_address session_id exec_context_id wait_duration_ms wait_type resource_address blocking_task_address blocking_session_id blocking_exec_context_id resource_description
0x8092E7FD3A7C2D84 64 0 289 IO_COMPLETION NULL NULL NULL NULL NULL