我目前正在部署基于 OFBiz 的 ERP 正在使用的数据库是 Oracle 10g Enterprise
最大的问题之一是一些oracle性能问题,分析ofbiz日志,如下查询:
SELECT DISTINCT ORDER_ID, ORDER_TYPE_ID, ORDER_NAME, EXTERNAL_ID,
SALES_CHANNEL_ENUM_ID, ORDER_DATE, ENTRY_DATE, VISIT_ID, STATUS_ID, CREATED_BY,
FIRST_ATTEMPT_ORDER_ID, CURRENCY_UOM, SYNC_STATUS_ID, BILLING_ACCOUNT_ID,
ORIGIN_FACILITY_ID, WEB_SITE_ID, PRODUCT_STORE_ID, TERMINAL_ID, TRANSACTION_ID,
AUTO_ORDER_SHOPPING_LIST_ID, NEEDS_INVENTORY_ISSUANCE, IS_RUSH_ORDER, INTERNAL_CODE,
REMAINING_SUB_TOTAL, GRAND_TOTAL, LAST_UPDATED_STAMP, LAST_UPDATED_TX_STAMP, CREATED_STAMP,
CREATED_TX_STAMP, RECIBIR_BODEGAL, RECEPCIONADA_BODEGAL, FECHA_RECEPCION_BODEGAL FROM
ERP.ORDER_HEADER WHERE ((STATUS_ID = :v0 OR STATUS_ID = :v1 OR STATUS_ID = :v2) AND
(ORDER_TYPE_ID = :v3)) ORDER BY ORDER_DATE DESC
很慢。我们已经测试了在没有 DISTINCT 的情况下执行查询,大约需要 30 秒。表中有 4.000.000 多个寄存器。PK 字段 orderId 和几乎所有其他字段都有索引
带有 DISTINCT 的解释计划是:
SELECT STATEMENT () (null)
SORT (ORDER BY) (null)
HASH (UNIQUE) (null)
TABLE ACCESS (FULL) ORDER_HEADER
并且没有 DISTINCT 是:
SELECT STATEMENT () (null)
SORT (ORDER BY) (null)
TABLE ACCESS (FULL) ORDER_HEADER
关于调整 oracle 以提高此类查询的性能的任何想法?重写查询非常困难,因为它是由ofbiz自动生成的,所以我认为解决方案是关于调整oracle
提前致谢
编辑:我使用 tkprof 分析了查询,正如 Rob van Wijk 和 haffax 所建议的那样,结果如下
********************************************************************************
SELECT DISTINCT ORDER_ID, ORDER_TYPE_ID, ORDER_NAME, EXTERNAL_ID,
SALES_CHANNEL_ENUM_ID, ORDER_DATE, ENTRY_DATE, VISIT_ID, STATUS_ID, CREATED_BY,
FIRST_ATTEMPT_ORDER_ID, CURRENCY_UOM, SYNC_STATUS_ID, BILLING_ACCOUNT_ID,
ORIGIN_FACILITY_ID, WEB_SITE_ID, PRODUCT_STORE_ID, TERMINAL_ID, TRANSACTION_ID,
AUTO_ORDER_SHOPPING_LIST_ID, NEEDS_INVENTORY_ISSUANCE, IS_RUSH_ORDER, INTERNAL_CODE,
REMAINING_SUB_TOTAL, GRAND_TOTAL, LAST_UPDATED_STAMP, LAST_UPDATED_TX_STAMP, CREATED_STAMP,
CREATED_TX_STAMP, RECIBIR_BODEGAL, RECEPCIONADA_BODEGAL, FECHA_RECEPCION_BODEGAL FROM
ERP.ORDER_HEADER WHERE STATUS_ID = 'ORDER_COMPLETED' ORDER BY ORDER_DATE DESC
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.03 0.01 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 9.10 160.81 66729 65203 37 50
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 3 9.14 160.83 66729 65203 37 50
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 58
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 1 0.00 0.00
db file scattered read 8178 0.28 146.55
direct path write temp 2200 0.04 4.22
direct path read temp 36 0.14 2.01
SQL*Net more data to client 3 0.00 0.00
SQL*Net message from client 1 3.36 3.36
********************************************************************************
所以看来问题是“数据库文件分散读取”,关于如何调整 oracle 以减少此事件中的等待的任何想法?
跟进新的 tkprof 结果,这次关闭会话:
********************************************************************************
SELECT DISTINCT ORDER_ID, ORDER_TYPE_ID, ORDER_NAME, EXTERNAL_ID,
SALES_CHANNEL_ENUM_ID, ORDER_DATE, ENTRY_DATE, VISIT_ID, STATUS_ID, CREATED_BY,
FIRST_ATTEMPT_ORDER_ID, CURRENCY_UOM, SYNC_STATUS_ID, BILLING_ACCOUNT_ID,
ORIGIN_FACILITY_ID, WEB_SITE_ID, PRODUCT_STORE_ID, TERMINAL_ID, TRANSACTION_ID,
AUTO_ORDER_SHOPPING_LIST_ID, NEEDS_INVENTORY_ISSUANCE, IS_RUSH_ORDER, INTERNAL_CODE,
REMAINING_SUB_TOTAL, GRAND_TOTAL, LAST_UPDATED_STAMP, LAST_UPDATED_TX_STAMP, CREATED_STAMP,
CREATED_TX_STAMP, RECIBIR_BODEGAL, RECEPCIONADA_BODEGAL, FECHA_RECEPCION_BODEGAL FROM
ERP.ORDER_HEADER WHERE STATUS_ID = 'ORDER_COMPLETED' ORDER BY ORDER_DATE DESC
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.03 0.01 0 0 0 0
Execute 2 0.00 0.00 0 0 0 0
Fetch 1 8.23 47.66 66576 65203 31 50
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 4 8.26 47.68 66576 65203 31 50
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 58
Rows Row Source Operation
------- ---------------------------------------------------
50 SORT ORDER BY (cr=65203 pr=66576 pw=75025 time=47666679 us)
3456659 TABLE ACCESS FULL ORDER_HEADER (cr=65203 pr=65188 pw=0 time=20757300 us)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 1 0.00 0.00
db file scattered read 8179 0.14 34.96
direct path write temp 2230 0.00 3.91
direct path read temp 52 0.14 0.84
SQL*Net more data to client 3 0.00 0.00
SQL*Net message from client 1 1510.62 1510.62
********************************************************************************