【SAP HANA】HANA trace管理

tracle 类型
tracle 配置
tracle 级别
SQL tracle
Performance Trace
Expensive Statements Trace
Kernel profiler
Plan trace
dump

1.Tracle

Database Trace          　　     : default active    :confingure: global.ini(for all services) or services specific files such as indexserver.ini SAP NOTE 2380176
SQL trace           　　　   　   : default Inactive
Performance Trace       　　   : default Inactive
Expensive Statement trace      : default Inactive
Plan trace           　　　　　   : default Inactive
kernel profile           　　　　: default Inactive
User-specfic trace

2. traces 配置:
privilege TRACE ADMIN
configure the kernel profile: have role SAP_INTERNAL_HANA_SUPPORT

if a a trace component is available in all sevices,the trace level can be configured for all servcies at once.it is also possible to configure the trace level
of a component individually for a specific service. the tracel level of a component configured at servcies level overrides the tracel level configured for all services.
some conponents are only available in a particular service and cannot therefore be changed globally.

3.trace 级别:

NONE (0)/FATAL(1)/ERROR(2)/WARNING(3)/INFO(4)/DEBUG(5)
evan if you select trace level NONE,inforamtion about error situations is still recorded.

4.SQL trace

SQL trace collect information about all SQL statements executed on the index server(tenant Db)/name server(system db).
is saved as an executable python program(by default sqltrace_<...>.py),which can be used to replay the traced db oeprations.
can use SQL trace ANalyzer tool to autmate the anlysis of the file.
SAP Note 2412519 FAQ:SAP HANA SQL Trace analyzer

_{5. Performance Trace}

files .tpp or .cpt

alter system start perftrace

6. Expensive Statements Trace inforamtion

need TRACE ADMIN , M_EXPENSIVE_STATEMENTS

Enable global.ini parameter expensive_statement

7. Kernel profiler
Need SAP_INTERNAL_HANA_SUPPORT, active in SAP HANA DB explorer
collects inforamtion about requent and/or expensive execution paths during qurey processing
file: CPU_<service>_<host>_<port>_<timestamp>.<format> WAIT_<service>_<host>_<port>_<timestamp>.<format> KCacheGrind or DOT

8. Plan trace only select statement are traced
global.ini parameter maxfiles and maxfilesize control the the trace log roatation.

9. Generate full system dump

<sid>adm ,cdpy navigate to python_support
python fullsystemInfoDump.py #located in $DIR_INSTANCE/exe/python_support

来源：https://www.cnblogs.com/tingxin/p/12577560.html

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