分析诊断进程跟踪文件工具ASS.AWK(1)

一个强大的分析诊断进程跟踪文件的工具ASS.AWK

你可以使用下面方法产生系统状态跟踪文件

process state dumps ==一个进程的所有对象状态,假如确认哪个进程有问题,就用该方法

system state dumps==整个系统的所有进程中的所有对象状态

process state dumps

~~~~~~~~~~~~~~~~~~~~~

1.ALTER SESSION SET EVENTS 'IMMEDIATE TRACE NAME PROCESSSTATE LEVEL 10';

2.event = '604 trace name processstate,level 10'

3.oradebug setospid 进程ID

oradebug dump processstate 10;

system state dumps

~~~~~~~~~~~~~~~~~~~~~

1.ALTER SESSION SET EVENTS 'IMMEDIATE TRACE NAME SYSTEMSTATE LEVEL 10';

2.event = '604 trace name systemstate,level 10'

ass.awk的脚本

===========

ass.awk

===========

REM ------------------------------------------------------------------------------------------------

REM #DESC: Generate a formatted report from system state dump showing who's blocking whom

REM Usage: See below

REM Description: Must run this script on the db server where the trace file resides

REM ------------------------------------------------------------------------------------------------

# Usage InstrUCtions

# ~~~~~~~~~~~~~~~~~~

#Usage: [n]awk -f ass.awk fname.trc (But read the Portability Section !!)

#

#Configuring Ass:

#

# By default, 'ass' attempts to dump as much information as possible and

#assumes that the output is to be printed to screen. This means that 'ass'

#runs in its slowest mode. Ass can be changed/speeded up by amending the

#following variables in the BEGIN section :

#

# interactive...........1 = show indication of processing [default]

# 0 = don't show anything (faster)

# verbose...............1 = prints additional info[default]

# 0 = don't show info (faster)

# eventdetail...........1 = prints additional event info for selected events

# [default]

# 0 = don't do the above (faster)

# skipbranch............1 = Skip 'branch of' state objects cause by SQL*NET

# loopback sessions etc (default)

# 0 = don't skip 'branch of' transactions

# seqinfo...............1 = Output sequence number for WAITING processes

# 0 = Do not dump seq# information.

#

# Portability

# ~~~~~~~~~~~

#1) This uses the nawk extension of functions. Some variants of awk accept

# this (eg HP-UX v10) and others do not. Use nawk if awk fails !!

#

#Alpha OSF/1nawk IBM RS/6000 awk

#Sun Solarisnawk HPUXawk (v10)???

(v9)

#Sun SunOSnawk Sequent nawk

#

#2) The Alpha version of awk can only handle 99 fields and will return

# a message like 'awk: Line ..... cannot have more than 99 fields'.

# The w/a: Either change the identified line or use a different platform.

#

# Known Restrictions

# ~~~~~~~~~~~~~~~~~~

#o The script assumes a certain structure to the System State. This means

#that this cannot be used on systemstates produced by MVS or VM.

#[To make it work the first two or three Words need to be stripped from]

#[each line in the systemstate trace file. ]

#

#o This has been developed to work with Oracle7. It *may* work with Oracle

#version 6 but this has not been tested.

#

#o The code currently does not recognise processes that are CONVERTING locks.

#Eg, I have an SX lock and I am requesting the higher SSX mode.

#This will result in the process as waiting for a lock when it owns it. Note

#that if any other process has the resource locked then both are listed

#as holding the resource but a SELF-DEADLOCK is not flagged.

#

#o It looks like there may be a bug with listing processes that are

#blocking others because they have a buffer s.o. that others are waiting

#on.

#

# Coding Notes

# ~~~~~~~~~~~~

#o There's an obscure usage of building the blkres word list. It seems

#that you cannot just say : blkres[a,b] = blkres[a,b] " " newval

#You have to use a temporary variable ('tb' in our case) to achieve this.

#o Sequent doesn't seem to like logical operators being used with regular

#eXPressions. Hence the 'wait event' section had to be re-written to use

#$0 ~ /a/ $0 ~ /b/. Just try the following test :

#

# NR == 1 && /a/ /b/ { print }

#

# History

# ~~~~~~~

#kquinn.ukv1.0.004/96 Created

#kquinn.ukv1.0.104/96 Minor changes to run with nawk on OSF1 and AIX

# Blocking Section's output changed slightly

#kquinn.ukv1.0.204/96 Dumps object names for library objects

# Now sequent-nawk aware

# First public release

#kquinn.ukv1.0.306/96 File I/O wait events now output file, block etc

#kquinn.ukv1.0.407/96 Parallel Query Dequeue Reason codes now output

#kquinn.ukv1.0.508/96 Added QC to QS code

# Added code to skip 'branch of' state objects

#kquinn.ukv1.0.503/97 Output Oracle command based on 'oct:' code.

# (Note that only the PARENT session's command

#code is output).

# Strip carriage returns (^M)

#kquinn.ukv1.0.610/97 Indicate dead processes

#kquinn.ukv1.0.709/98 Print some more wait information for certain

# wait events and handle waits on the sequence

# enqueue.

#kquinn.ukv1.0.812/98 Minor changes

# Changed to accomodate new systemstate format

# so that we identify the start of a systemstate

# correctly once more.

# Added seq# processing for waiting processes.

# Dumped more info for DFS lock acquisition

#

# Current Enhancement Requests Oustanding

# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#o Pick out error code in PQO Queue Ref's

#o Test concatenating all array elements so that we affectively use singular

#arrays. This may speed the processing depending upon how the implementation

#of awk uses multi-dimensional arrays.

#

##############################################################################

# Any failure cases or suggested improvements then please Email KQUINN.UK#

# with the details and the system state file (if relevant).#

##############################################################################

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