Here's what 'perf top' said on streaming replica : Samples: 26K of event 'cpu-clock', Event count (approx.): 19781 95.97% postgres [.] 0x00000000002210f3 0.41% perf [.] 0x000000000005f225 0.39% libc-2.12.so [.] __strstr_sse2 0.22% libc-2.12.so [.] memchr 0.22% [kernel] [k] kallsyms_expand_symbol 0.18% perf [.] symbols__insert 0.18% [kernel] [k] format_decode 0.15% libc-2.12.so [.] __GI___strcmp_ssse3 0.13% [kernel] [k] string 0.12% [kernel] [k] number 0.12% [kernel] [k] vsnprintf 0.12% libc-2.12.so [.] _IO_vfscanf 0.11% perf [.] dso__find_symbol 0.11% [kernel] [k] _spin_unlock_irqrestore 0.10% perf [.] hex2u64 0.10% postgres [.] hash_search_with_hash_value 0.09% perf [.] rb_next 0.08% libc-2.12.so [.] memcpy 0.07% libc-2.12.so [.] __strchr_sse2 0.07% [kernel] [k] clear_page 0.06% [kernel] [k] strnlen 0.05% perf [.] perf_evsel__parse_sample 0.05% perf [.] rb_insert_color 0.05% [kernel] [k] pointer
On Mon, Jun 30, 2014 at 2:05 PM, Heikki Linnakangas <hlinnakan...@vmware.com > wrote: > On 06/29/2014 03:43 PM, Soni M wrote: > >> top and sar says 100% cpu usage of one core, no sign of I/O wait. >> > > Hmm, I wonder what it's doing then... If you have "perf" installed on the > system, you can do "perf top" to get a quick overlook of where the CPU time > is spent. > > - Heikki > > -- Regards, Soni Maula Harriz
