Why we see high buffer memory on E3-FPC type 2?
The boards that are based on MPC85xx processor do use more buffers to receive packets, so higher heap usage is expected. Most of these buffers are owned by receive part of the ethernet driver and just seat in the queue waiting for the incoming data, in other words they are not leaked. Here are the high buffer outputs without any traffic
lab@Einstenium-M320> show chassis hardware detail Hardware inventory: Item Version Part number Serial number Description Chassis 71103 M320 Midplane REV 05 710-009120 RB5259 M320 Midplane Routing Engine 0 REV 10 740-008883 P11123911393 RE-4.0 ad0 245 MB STI Flash 7.3.0 STI1J9D606257154901 Compact Flash ad1 38154 MB FUJITSU MHV2040AS NT14T6828NK0 Hard Disk Routing Engine 1 CB 0 REV 07 710-009115 JL5995 M320 Control Board CB 1 REV 07 710-009115 JN0782 M320 Control Board FPC 0 REV 07 710-016170 WL2586 M320 E3-FPC Type 2 PIC 0 REV 09 750-011800 JX6418 8x 1GE(LAN), IQ2 Xcvr 0 REV 01 740-011613 PCC4LJP SFP-SX Xcvr 1 REV 01 740-011782 P8E1Q8Z SFP-SX Xcvr 2 NON-JNPR PE12B5B SFP-SX Xcvr 3 REV 01 740-011782 PAN53T2 SFP-SX Xcvr 5 REV 01 740-013111 7447631 SFP-T Xcvr 6 REV 01 740-011613 PCD4FW4 SFP-SX Xcvr 7 REV 01 740-011613 PCE03YV SFP-SX PIC 1 REV 11 750-007745 NC4565 4x OC-3 SONET, SMIR I3MB A REV 04 710-016681 WL2713 M320 E3-FPC I3 Mez Board I3MB B REV 04 710-016681 WL2671 M320 E3-FPC I3 Mez Board
lab@Einstenium-M320> show chassis fpc Temp CPU Utilization (%) Memory Utilization (%) Slot State (C) Total Interrupt DRAM (MB) Heap Buffer 0 Online 46 3 0 1024 8 74 1 Online 42 1 0 256 12 49 2 Online 39 1 0 1024 2 49
lab@Einstenium-M320> start shell pfe network fpc0 SFPC0(Einstenium-M320 vty)# sh heap ID Base Total(b) Free(b) Used(b) % Name -- -------- --------- --------- --------- --- ----------- 0 410c9a68 1004716792 922597044 82119748 8 Kernel 1 7cef5d60 16777216 4268320 12508896 74 Uncached 2 7fefffe0 1048560 1048560 0 0 Blob 3 7def5d60 33595288 33595288 0 0 ISSU scratch