Check Routing Protocol Process (rpd) Memory Usage
Purpose
When you notice a lot of memory usage, you can obtain detailed information about the memory utilization of routing tasks to get an idea of what is going on. The routing process (rpd) is the main task that uses Routing Engine memory.
Action
To check routing process memory usage, enter the following Junos OS CLI operational mode commands:
Sample Output
user@host> show route summary
Autonomous system number: 209
Router ID: 205.175.0.170
inet.0: 179783 destinations, 898393 routes (179771 active, 146 holddown, 157 hidden)
Direct: 17 routes, 17 active
Local: 18 routes, 18 active
BGP: 896632 routes, 178010 active
Static: 32 routes, 31 active
IS-IS: 1694 routes, 1694 active
inet.2: 8766 destinations, 22700 routes (8766 active, 124 holddown, 73 hidden)
Direct: 17 routes, 17 active
Local: 18 routes, 18 active
BGP: 20939 routes, 7006 active
Static: 32 routes, 31 active
IS-IS: 1694 routes, 1694 active
inet.3: 1614 destinations, 1719 routes (1614 active, 0 holddown, 0 hidden)
IS-IS: 1613 routes, 1551 active
RSVP: 45 routes, 45 active
LDP: 61 routes, 18 active
iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
Direct: 1 routes, 1 active
mpls.0: 371 destinations, 371 routes (371 active, 0 holddown, 0 hidden)
MPLS: 3 routes, 3 active
RSVP: 303 routes, 303 active
LDP: 65 routes, 65 active
user@R1> show task memory detail
------------------------- Overall Memory Report -------------------------
Size TP Allocs Mallocs AllocBytes MaxAllocs MaxBytes FreeBytes
12 8140 186959 2341188 200824 2409888 54972
16 4061 182 67888 4586 73376 5840
16 T - - - 393571 6297136 -
20 688588 51 13772780 713704 14274080 423956
[...Output truncated...]
8192 P 91 - 745472 195 1597440 -
12288 P - - - 1 12288 -
block 5 - 137200 14 137732 6160
pool 50 - 896 100 1792 3200
alloc - 8 383744 10 397365 9472
-------------------------------------------------------------------------
389169664 578341705 72977920
------------------------ Allocator Memory Report ------------------------
Name Size Alloc DTP Alloc Alloc MaxAlloc MaxAlloc
Size Blocks Bytes Blocks Bytes
patricia_root_struct 8 12 7741 92892 8130 97560
sockaddr_un.i802 8 12 2 24 2 24
sockaddr_un.tag 8 12 371 4452 995 11940
if_addr_entry 8 12 - - 1 12
gw_entry_list 8 12 1 12 1 12
isis_proto_list 8 12 25 300 30 360
struct krt_scb 12 16 4 64 6 96
ldp_rt_data 12 16 61 976 133 2128
config_list 12 16 2353 37648 2353 37648
TED NodeInfo 12 16 845 13520 907 14512
isis_area_addr 12 16 544 8704 612 9792
isis_nh_list 12 16 237 3792 922 14752
isis_tsi 12 16 17 272 19 304
bgp_use_block 12 16 - - 112 1792
isis_route_walk_cont 12 16 T - - 1 16
bgpg_rtinfo_entry 12 16 T - - 393571 6297136
task_floating_socket 16 20 1 20 1 20
[...Output truncated...]
rt_parse_memory 4092 4096 TP - - 1 4096
noblock_buffer_blk 4092 4096 TP 5 20480 811 3321856
bgp_buffer 4100 8192 P 91 745472 100 819200
bgp_outbuf 4104 8192 P - - 94 770048
ldp_buffer 4108 8192 P - - 7 57344
RPD SNMP 8268 12288 P - - 1 12288
LDP config various 1 896 1 896
-------------------------------------------------------------------------
349037508 543172620
-------------------------- Malloc Usage Report --------------------------
Name Allocs Bytes MaxAllocs MaxBytes FuncCalls
MGMT.local 1 12 1 12 1
RSVP - - 1 2048 156084
BGP_Group_Tweak-RTClien 2 24 2 24 2
[...Output truncated...]
LDP 2 24 2 24 2
KRT Request - - 1 16 446888
BGP_Group_Packet-Design 2 24 2 24 38
[...Output truncated...]
MPLS 22272 1221656 22274 1221784 228522
BGP.0.0.0.0+179 186419 2237028 192292 2307504 282141191
IS-IS I/O./var/run/ppmd 1 66536 43 103916 695536231
IS-IS 2407 361372 5887 446076 889294754
BGP RT Background 3 66556 3 66556 3
SNMP Subagent./var/run/ - 24 1 9144 3677022
KRT 2 205616 3 207900 10
ASPaths 13901 1581544 18023 2067605 293868769
RT 27 556 28 580 2815
Scheduler 194 2604 199 2684 41382
--Anonymous-- 4294944918 4293764616 4294967294 4294967292 45560848
--System-- 38565 35474324 38684 35487048 235115763
-------------------------------------------------------------------------
40015436 41923181
Dynamically allocated memory: 485789696 Maximum: 541736960
Program data+BSS memory: 2101248 Maximum: 2101248
Page data overhead: 3039232 Maximum: 3039232
Page directory size: 512000 Maximum: 512000
----------
Total bytes in use: 491442176 (70% of available memory)
Meaning
The sample output shows summary statistics about the entries in the routing table (show route summary command) and the memory usage breakdown (show task memory detail command) for the routing process (rpd). The two commands provide a comprehensive picture of the memory utilization of the routing protocol process.
The show route summary command shows the number of routes in the various routing tables. In the sample output, the routing tables represented are inet.0, inet.2, inet.3, iso.0, and mpls.0. Within each routing table, all of the active, hold-down, and hidden destinations and routes are summarized for all the protocols from which routes are learned. Routes are in the hold-down state prior to being declared inactive, and hidden routes are not used because of routing policy. Routes in the hold-down and hidden states are still using memory because they appear in the routing table.
In addition, routes are summarized in the following categories: those directly connected to the network (Direct), local routes (Local), and routes learned from configured routing protocols, such as BGP and IS-IS.
The show task memory detail command lists the data structures within the tasks run by the routing protocol process (rpd). Tasks are enabled depending on the router’s configuration. For example, isis_area_addr is a data structure resulting from the IS-IS configuration. The AllocBytes field indicates the highest amount of memory used by the data structure. For example, the isis_area_addr data structure has 544 blocks of allocated memory, each block is allocated a value of 16 bytes, resulting in allocated bytes of 8704. The maximum allocated blocks and bytes are high-water marks for a data structure. For more information on displaying task-related information, see Display Tasks.
The Total bytes in use field shows the total amount of memory used by the routing protocol process (rpd).
