01-25-2017
I tend to have this deployed to look at in general (if needed) :
InstallationApacheTomcat * psi-probe/psi-probe Wiki * GitHub
The software is gpl, has a relatively small footprint when deployed.
Of course, standard commands work as well (vmstat, iostat etc.), but this should help in investigation.
You can use various 'developers consoles' or firebugs to examine where
it's stuck from the client side using browser.
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LEARN ABOUT CENTOS
tapset::memory
tapset::memory(3stap) tapset::memory(3stap)
NAME
tapset::memory - systemtap memory tapset
DESCRIPTION
This family of probe points is used to probe memory-related events.
vm_fault_contains
Test return value for page fault reason
See function::vm_fault_contains(3stap)
for details.
vm.pagefault
Records that a page fault occurred
See probe::vm.pagefault(3stap)
for details.
vm.pagefault.return
Indicates what type of fault occurred
See probe::vm.pagefault.return(3stap)
for details.
addr_to_node
Returns which node a given address belongs to within a NUMA system
See function::addr_to_node(3stap)
for details.
vm.write_shared
Attempts at writing to a shared page
See probe::vm.write_shared(3stap)
for details.
vm.write_shared_copy
Page copy for shared page write
See probe::vm.write_shared_copy(3stap)
for details.
vm.mmap
Fires when an mmap is requested
See probe::vm.mmap(3stap)
for details.
vm.munmap
Fires when an munmap is requested
See probe::vm.munmap(3stap)
for details.
vm.brk Fires when a brk is requested (i.e. the heap will be resized)
See probe::vm.brk(3stap)
for details.
vm.oom_kill
Fires when a thread is selected for termination by the OOM killer
See probe::vm.oom_kill(3stap)
for details.
vm.kmalloc
Fires when kmalloc is requested
See probe::vm.kmalloc(3stap)
for details.
vm.kmem_cache_alloc
Fires when kmem_cache_alloc is requested
See probe::vm.kmem_cache_alloc(3stap)
for details.
vm.kmalloc_node
Fires when kmalloc_node is requested
See probe::vm.kmalloc_node(3stap)
for details.
vm.kmem_cache_alloc_node
Fires when kmem_cache_alloc_node is requested
See probe::vm.kmem_cache_alloc_node(3stap)
for details.
vm.kfree
Fires when kfree is requested
See probe::vm.kfree(3stap)
for details.
vm.kmem_cache_free
Fires when kmem_cache_free is requested
See probe::vm.kmem_cache_free(3stap)
for details.
SEE ALSO
function::vm_fault_contains(3stap), function::addr_to_node(3stap), probe::vm.pagefault(3stap), probe::vm.pagefault.return(3stap),
probe::vm.write_shared(3stap), probe::vm.write_shared_copy(3stap), probe::vm.mmap(3stap), probe::vm.munmap(3stap),
probe::vm.brk(3stap), probe::vm.oom_kill(3stap), probe::vm.kmalloc(3stap), probe::vm.kmem_cache_alloc(3stap),
probe::vm.kmalloc_node(3stap), probe::vm.kmem_cache_alloc_node(3stap), probe::vm.kfree(3stap), probe::vm.kmem_cache_free(3stap),
stap(1), stapprobes(3stap)
IBM
--- tapset::memory(3stap)