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  1. Traffic Server
  2. TS-3261

possible slow leak in v5.2.0

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 5.2.0
    • Fix Version/s: 5.2.0
    • Component/s: Core
    • Labels:
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      Description

      After fixing the iobuffer leak in TS-3257, the iobuffers seem stable on v5.2.0, but, there still seems to be a slow memory leak. The RES memory from top shows 15g after running v5.2.0 in prod for more than 3 days, whereas the corresponding v5.0 host shows 10g after running for more than a week.

      Below is the dump of iobuffers between the v5.2.0 and v5.0 host - as expected, most iobufs are lower than v5.0 host (since, the v5.0 host been running longer), except the 32k buffer (iobuf[8]). But, the leak doesn't seem to be explained by the difference in 32k buffers either, as it is not high enough to explain the 5g difference in total memory.

      v5.2.0 host:

           allocated      |        in-use      | type size  |   free list name
      --------------------|--------------------|------------|----------------------------------
                 67108864 |           25165824 |    2097152 | memory/ioBufAllocator[14]
               2013265920 |         1825570816 |    1048576 | memory/ioBufAllocator[13]
                620756992 |          549978112 |     524288 | memory/ioBufAllocator[12]
                780140544 |          593494016 |     262144 | memory/ioBufAllocator[11]
                742391808 |          574619648 |     131072 | memory/ioBufAllocator[10]
                901775360 |          735576064 |      65536 | memory/ioBufAllocator[9]
               1189085184 |         1093304320 |      32768 | memory/ioBufAllocator[8]
                474480640 |          348733440 |      16384 | memory/ioBufAllocator[7]
                269221888 |          211320832 |       8192 | memory/ioBufAllocator[6]
                156762112 |          142999552 |       4096 | memory/ioBufAllocator[5]
                        0 |                  0 |       2048 | memory/ioBufAllocator[4]
                   131072 |                  0 |       1024 | memory/ioBufAllocator[3]
                    65536 |                  0 |        512 | memory/ioBufAllocator[2]
                    65536 |                256 |        256 | memory/ioBufAllocator[1]
                    16384 |                  0 |        128 | memory/ioBufAllocator[0]
      
      

      v.5.0.0 host:

           allocated      |        in-use      | type size  |   free list name
      --------------------|--------------------|------------|----------------------------------
                134217728 |           31457280 |    2097152 | memory/ioBufAllocator[14]
               2147483648 |         1843396608 |    1048576 | memory/ioBufAllocator[13]
                788529152 |          608174080 |     524288 | memory/ioBufAllocator[12]
                897581056 |          680525824 |     262144 | memory/ioBufAllocator[11]
                796917760 |          660471808 |     131072 | memory/ioBufAllocator[10]
                985661440 |          818479104 |      65536 | memory/ioBufAllocator[9]
                873463808 |          677969920 |      32768 | memory/ioBufAllocator[8]
                544735232 |          404439040 |      16384 | memory/ioBufAllocator[7]
                310902784 |          237887488 |       8192 | memory/ioBufAllocator[6]
                160956416 |          115515392 |       4096 | memory/ioBufAllocator[5]
                        0 |                  0 |       2048 | memory/ioBufAllocator[4]
                   131072 |               2048 |       1024 | memory/ioBufAllocator[3]
                    65536 |                  0 |        512 | memory/ioBufAllocator[2]
                    98304 |              50688 |        256 | memory/ioBufAllocator[1]
      
      

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            • Assignee:
              sudheerv Sudheer Vinukonda
              Reporter:
              sudheerv Sudheer Vinukonda
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              • Created:
                Updated:
                Resolved: