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Re: Help!Why CPU Usage and LoadAverage Jump up Suddenly

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try again


2013/12/5 吕晓旭 <lxxstcno1@xxxxxxxxx>

delete monitor image


2013/12/5 吕晓旭 <lxxstcno1@xxxxxxxxx>


Hi, all
    We find so weird problem on our productive PostgreSQL system. And I don't know how could I do to resolve this problem.
    We deployed PostgreSQL 9.2.4 on two system environments,  and the performances between them are absolutely different. one of them it's perfect, and the other one lets me down, CPU Usage and LoadAverage Jumped up Suddenly when concurrency smoothly rising up, simultaneously, average response time become unacceptable.
    Anyone, who could give me some advice?

    The parameters of system environment and PotgreSQL listed below:
  • QPS Chart

  • performance perfect on
    • system environment
      $ uname -a
      Linux l-interdb3.f.cn1 2.6.18-238.19.1.el5 #1 SMP Fri Jul 15 07:31:24 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux
      
      $ cat /etc/redhat-release 
      CentOS release 5.6 (Final)
      
      $ free -m
                   total       used       free     shared    buffers     cached
      Mem:         96678      95620       1058          0        443      84607
      -/+ buffers/cache:      10568      86109
      Swap:        49151          0      49151
      
      $ cat /proc/cpuinfo
      processor       : 23
      vendor_id       : GenuineIntel
      cpu family      : 6
      model           : 44
      model name      : Intel(R) Xeon(R) CPU           E5645  @ 2.40GHz
      stepping        : 2
      cpu MHz         : 2400.146
      cache size      : 12288 KB
      physical id     : 1
      siblings        : 12
      core id         : 9
      cpu cores       : 6
      apicid          : 51
      fpu             : yes
      fpu_exception   : yes
      cpuid level     : 11
      wp              : yes
      flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx pdpe1gb rdtscp lm constant_tsc ida nonstop_tsc arat pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr sse4_1 sse4_2 popcnt lahf_lm
      bogomips        : 4800.10
      clflush size    : 64
      cache_alignment : 64
      address sizes   : 40 bits physical, 48 bits virtual
      power management: [8]
      
    • pg_config
      BINDIR = /opt/pg92/bin
      DOCDIR = /opt/pg92/share/doc/postgresql
      HTMLDIR = /opt/pg92/share/doc/postgresql
      INCLUDEDIR = /opt/pg92/include
      PKGINCLUDEDIR = /opt/pg92/include/postgresql
      INCLUDEDIR-SERVER = /opt/pg92/include/postgresql/server
      LIBDIR = /opt/pg92/lib
      PKGLIBDIR = /opt/pg92/lib/postgresql
      LOCALEDIR = /opt/pg92/share/locale
      MANDIR = /opt/pg92/share/man
      SHAREDIR = /opt/pg92/share/postgresql
      SYSCONFDIR = /opt/pg92/etc/postgresql
      PGXS = /opt/pg92/lib/postgresql/pgxs/src/makefiles/pgxs.mk
      CONFIGURE = '--prefix=/opt/pg92' '--with-perl' '--with-libxml' '--with-libxslt' '--with-ossp-uuid' 'CFLAGS= -march=core2 -O2 '
      CC = gcc
      CPPFLAGS = -D_GNU_SOURCE -I/usr/include/libxml2
      CFLAGS = -march=core2 -O2  -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv
      CFLAGS_SL = -fpic
      LDFLAGS = -Wl,-rpath,'/opt/pg92/lib',--enable-new-dtags
      LDFLAGS_EX = 
      LDFLAGS_SL = 
      LIBS = -lpgport -lxslt -lxml2 -lz -lreadline -ltermcap -lcrypt -ldl -lm 
      VERSION = PostgreSQL 9.2.4
      
    • performace


  • performance weird
    • system environment(kernel 2.6.32-220 is also tested, no different on performance)
      $ uname -a
      Linux l-interdb11.f.cn1 3.2.34-1.el6.x86_64 #1 SMP Mon Jan 14 18:23:19 CST 2013 x86_64 x86_64 x86_64 GNU/Linux
      
      $ cat /etc/redhat-release 
      CentOS release 6.2 (Final)
      
      $ free -m
                   total       used       free     shared    buffers     cached
      Mem:         64387      62907       1479          0        182      56524
      -/+ buffers/cache:       6200      58186
      Swap:        49151        494      48657
      
      $ cat /proc/cpuinfo
      processor	: 23
      vendor_id	: GenuineIntel
      cpu family	: 6
      model		: 45
      model name	: Intel(R) Xeon(R) CPU E5-2630 0 @ 2.30GHz
      stepping	: 7
      microcode	: 0x70d
      cpu MHz		: 2300.020
      cache size	: 15360 KB
      physical id	: 1
      siblings	: 12
      core id		: 5
      cpu cores	: 6
      apicid		: 43
      initial apicid	: 43
      fpu		: yes
      fpu_exception	: yes
      cpuid level	: 13
      wp		: yes
      flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid
      bogomips	: 4599.34
      clflush size	: 64
      cache_alignment	: 64
      address sizes	: 46 bits physical, 48 bits virtual
      
    • pg_config
      $ pg_config 
      BINDIR = /opt/pg92/bin
      DOCDIR = /opt/pg92/share/doc/postgresql
      HTMLDIR = /opt/pg92/share/doc/postgresql
      INCLUDEDIR = /opt/pg92/include
      PKGINCLUDEDIR = /opt/pg92/include/postgresql
      INCLUDEDIR-SERVER = /opt/pg92/include/postgresql/server
      LIBDIR = /opt/pg92/lib
      PKGLIBDIR = /opt/pg92/lib/postgresql
      LOCALEDIR = /opt/pg92/share/locale
      MANDIR = /opt/pg92/share/man
      SHAREDIR = /opt/pg92/share/postgresql
      SYSCONFDIR = /opt/pg92/etc/postgresql
      PGXS = /opt/pg92/lib/postgresql/pgxs/src/makefiles/pgxs.mk
      CONFIGURE = '--prefix=/opt/pg92' '--with-perl' '--with-libxml' '--with-libxslt' '--with-ossp-uuid' 'CFLAGS= -m64 -march=native -O3 -mavx'
      CC = gcc
      CPPFLAGS = -D_GNU_SOURCE -I/usr/include/libxml2
      CFLAGS = -m64 -march=native -O3 -mavx -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard
      CFLAGS_SL = -fpic
      LDFLAGS = -Wl,--as-needed -Wl,-rpath,'/opt/pg92/lib',--enable-new-dtags
      LDFLAGS_EX = 
      LDFLAGS_SL = 
      LIBS = -lpgport -lxslt -lxml2 -lz -lreadline -lcrypt -ldl -lm 
      VERSION = PostgreSQL 9.2.4
      
    • performace


    • Average Response Time:


Thanks~~




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