brpc
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apache
butil::get_resource<Task> 疑似内存泄漏
Describe the bug (描述bug) 使用BRPC框架的进程，长期运行(一个月)，可以观察到内存持续上涨，如下图：
追踪内存泄漏位置如下
To Reproduce (复现方法) 单进程2k左右qps， 消息请求平均大小150KB
Expected behavior (期望行为) 期望内存不会持续上涨
Versions (各种版本)
OS:
Linux 5.15.0-125.006 #125~20.04.3 SMP Fri May 24 11:59:50 +08 2024 x86_64 x86_64 x86_64 GNU/Linux
Compiler:
g++ (Ubuntu 9.4.0-1ubuntu1~20.04.2) 9.4.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
brpc:
tag 1.10.0
jemalloc 生成的内存分布图：
3_5.pdf
jemalloc 生成的内存分布占比： memory.txt
curl ip:port/memory to see memory usage? @ZhengweiZhu
------------------------------------------------
generic.current_allocated_bytes: 77085790744
generic.heap_size: 80877740032
tcmalloc.current_total_thread_cache_bytes: 29244968
tcmalloc.central_cache_free_bytes: 122838856
tcmalloc.transfer_cache_free_bytes: 0
tcmalloc.thread_cache_free_bytes: 29414048
tcmalloc.pageheap_free_bytes: 0
tcmalloc.pageheap_unmapped_bytes: 3638689792
------------------------------------------------
MALLOC: 77087045496 (73515.9 MiB) Bytes in use by application
MALLOC: + 0 ( 0.0 MiB) Bytes in page heap freelist
MALLOC: + 122842312 ( 117.2 MiB) Bytes in central cache freelist
MALLOC: + 0 ( 0.0 MiB) Bytes in transfer cache freelist
MALLOC: + 29137856 ( 27.8 MiB) Bytes in thread cache freelists
MALLOC: + 232419520 ( 221.7 MiB) Bytes in malloc metadata
MALLOC: ------------
MALLOC: = 77471445184 (73882.5 MiB) Actual memory used (physical + swap)
MALLOC: + 3638714368 ( 3470.1 MiB) Bytes released to OS (aka unmapped)
MALLOC: ------------
MALLOC: = 81110159552 (77352.7 MiB) Virtual address space used
MALLOC:
MALLOC: 2379176 Spans in use
MALLOC: 170 Thread heaps in use
MALLOC: 8192 Tcmalloc page size
------------------------------------------------
Call ReleaseFreeMemory() to release freelist memory to the OS (via madvise()).
Bytes released to the OS take up virtual address space but no physical memory.
------------------------------------------------
Total size of freelists for per-thread caches,
transfer cache, and central cache, by size class
------------------------------------------------
class 1 [ 8 bytes ] : 6935 objs; 0.1 MiB; 0.1 cum MiB
class 2 [ 16 bytes ] : 44906 objs; 0.7 MiB; 0.7 cum MiB
class 3 [ 32 bytes ] : 260538 objs; 8.0 MiB; 8.7 cum MiB
class 4 [ 48 bytes ] : 228282 objs; 10.4 MiB; 19.1 cum MiB
class 5 [ 64 bytes ] : 38678 objs; 2.4 MiB; 21.5 cum MiB
class 6 [ 80 bytes ] : 55605 objs; 4.2 MiB; 25.7 cum MiB
class 7 [ 96 bytes ] : 30250 objs; 2.8 MiB; 28.5 cum MiB
class 8 [ 112 bytes ] : 26922 objs; 2.9 MiB; 31.4 cum MiB
class 9 [ 128 bytes ] : 3333 objs; 0.4 MiB; 31.8 cum MiB
class 10 [ 144 bytes ] : 14854 objs; 2.0 MiB; 33.8 cum MiB
class 11 [ 160 bytes ] : 5724 objs; 0.9 MiB; 34.7 cum MiB
class 12 [ 176 bytes ] : 4182 objs; 0.7 MiB; 35.4 cum MiB
class 13 [ 192 bytes ] : 19579 objs; 3.6 MiB; 39.0 cum MiB
class 14 [ 208 bytes ] : 144 objs; 0.0 MiB; 39.0 cum MiB
class 15 [ 224 bytes ] : 4019 objs; 0.9 MiB; 39.9 cum MiB
class 16 [ 240 bytes ] : 465 objs; 0.1 MiB; 40.0 cum MiB
class 17 [ 256 bytes ] : 3811 objs; 0.9 MiB; 40.9 cum MiB
class 18 [ 288 bytes ] : 450 objs; 0.1 MiB; 41.0 cum MiB
class 19 [ 320 bytes ] : 1230 objs; 0.4 MiB; 41.4 cum MiB
class 20 [ 352 bytes ] : 10479 objs; 3.5 MiB; 44.9 cum MiB
class 21 [ 384 bytes ] : 2202 objs; 0.8 MiB; 45.7 cum MiB
class 22 [ 416 bytes ] : 171 objs; 0.1 MiB; 45.8 cum MiB
class 23 [ 448 bytes ] : 2094 objs; 0.9 MiB; 46.7 cum MiB
class 24 [ 480 bytes ] : 179 objs; 0.1 MiB; 46.8 cum MiB
class 25 [ 512 bytes ] : 2345 objs; 1.1 MiB; 47.9 cum MiB
class 26 [ 576 bytes ] : 6329 objs; 3.5 MiB; 51.4 cum MiB
class 27 [ 640 bytes ] : 152 objs; 0.1 MiB; 51.5 cum MiB
class 28 [ 704 bytes ] : 1297 objs; 0.9 MiB; 52.4 cum MiB
class 29 [ 768 bytes ] : 1242 objs; 0.9 MiB; 53.3 cum MiB
class 30 [ 832 bytes ] : 215 objs; 0.2 MiB; 53.5 cum MiB
class 31 [ 896 bytes ] : 671 objs; 0.6 MiB; 54.0 cum MiB
class 32 [ 960 bytes ] : 43 objs; 0.0 MiB; 54.1 cum MiB
class 33 [ 1024 bytes ] : 550 objs; 0.5 MiB; 54.6 cum MiB
class 34 [ 1152 bytes ] : 1313 objs; 1.4 MiB; 56.0 cum MiB
class 35 [ 1280 bytes ] : 112 objs; 0.1 MiB; 56.2 cum MiB
class 36 [ 1408 bytes ] : 70 objs; 0.1 MiB; 56.3 cum MiB
class 37 [ 1536 bytes ] : 351 objs; 0.5 MiB; 56.8 cum MiB
class 38 [ 1792 bytes ] : 815 objs; 1.4 MiB; 58.2 cum MiB
class 39 [ 2048 bytes ] : 120 objs; 0.2 MiB; 58.4 cum MiB
class 40 [ 2304 bytes ] : 1071 objs; 2.4 MiB; 60.8 cum MiB
class 41 [ 2560 bytes ] : 439 objs; 1.1 MiB; 61.8 cum MiB
class 42 [ 2816 bytes ] : 84 objs; 0.2 MiB; 62.1 cum MiB
class 43 [ 3072 bytes ] : 32 objs; 0.1 MiB; 62.2 cum MiB
class 44 [ 3328 bytes ] : 47 objs; 0.1 MiB; 62.3 cum MiB
class 45 [ 4096 bytes ] : 204 objs; 0.8 MiB; 63.1 cum MiB
class 46 [ 4608 bytes ] : 23 objs; 0.1 MiB; 63.2 cum MiB
class 47 [ 5120 bytes ] : 14 objs; 0.1 MiB; 63.3 cum MiB
class 48 [ 6144 bytes ] : 23 objs; 0.1 MiB; 63.4 cum MiB
class 49 [ 6656 bytes ] : 10 objs; 0.1 MiB; 63.5 cum MiB
class 50 [ 8192 bytes ] : 643 objs; 5.0 MiB; 68.5 cum MiB
class 51 [ 9216 bytes ] : 22 objs; 0.2 MiB; 68.7 cum MiB
class 52 [ 10240 bytes ] : 18 objs; 0.2 MiB; 68.9 cum MiB
class 53 [ 12288 bytes ] : 10 objs; 0.1 MiB; 69.0 cum MiB
class 54 [ 13312 bytes ] : 11 objs; 0.1 MiB; 69.1 cum MiB
class 55 [ 16384 bytes ] : 8 objs; 0.1 MiB; 69.2 cum MiB
class 56 [ 20480 bytes ] : 16 objs; 0.3 MiB; 69.6 cum MiB
class 57 [ 24576 bytes ] : 4 objs; 0.1 MiB; 69.7 cum MiB
class 58 [ 26624 bytes ] : 6 objs; 0.2 MiB; 69.8 cum MiB
class 59 [ 32768 bytes ] : 17 objs; 0.5 MiB; 70.3 cum MiB
class 60 [ 40960 bytes ] : 12 objs; 0.5 MiB; 70.8 cum MiB
class 61 [ 49152 bytes ] : 9 objs; 0.4 MiB; 71.2 cum MiB
class 62 [ 57344 bytes ] : 5 objs; 0.3 MiB; 71.5 cum MiB
class 63 [ 65536 bytes ] : 10 objs; 0.6 MiB; 72.1 cum MiB
class 64 [ 73728 bytes ] : 6 objs; 0.4 MiB; 72.5 cum MiB
class 65 [ 81920 bytes ] : 3 objs; 0.2 MiB; 72.8 cum MiB
class 66 [ 90112 bytes ] : 4 objs; 0.3 MiB; 73.1 cum MiB
class 67 [ 98304 bytes ] : 1 objs; 0.1 MiB; 73.2 cum MiB
class 71 [ 131072 bytes ] : 1 objs; 0.1 MiB; 73.3 cum MiB
class 72 [ 139264 bytes ] : 1 objs; 0.1 MiB; 73.5 cum MiB
class 87 [ 262144 bytes ] : 1 objs; 0.2 MiB; 73.7 cum MiB
------------------------------------------------
PageHeap: 105 sizes; 0.0 MiB free; 3470.1 MiB unmapped
------------------------------------------------
1 pages * 259451 spans ~ 2027.0 MiB; 2027.0 MiB cum; unmapped: 2027.0 MiB; 2027.0 MiB cum
2 pages * 328 spans ~ 5.1 MiB; 2032.1 MiB cum; unmapped: 5.1 MiB; 2032.1 MiB cum
3 pages * 504 spans ~ 11.8 MiB; 2043.9 MiB cum; unmapped: 11.8 MiB; 2043.9 MiB cum
4 pages * 3651 spans ~ 114.1 MiB; 2158.0 MiB cum; unmapped: 114.1 MiB; 2158.0 MiB cum
5 pages * 10 spans ~ 0.4 MiB; 2158.4 MiB cum; unmapped: 0.4 MiB; 2158.4 MiB cum
6 pages * 13 spans ~ 0.6 MiB; 2159.0 MiB cum; unmapped: 0.6 MiB; 2159.0 MiB cum
7 pages * 10 spans ~ 0.5 MiB; 2159.5 MiB cum; unmapped: 0.5 MiB; 2159.5 MiB cum
8 pages * 10 spans ~ 0.6 MiB; 2160.2 MiB cum; unmapped: 0.6 MiB; 2160.2 MiB cum
9 pages * 2 spans ~ 0.1 MiB; 2160.3 MiB cum; unmapped: 0.1 MiB; 2160.3 MiB cum
10 pages * 3 spans ~ 0.2 MiB; 2160.5 MiB cum; unmapped: 0.2 MiB; 2160.5 MiB cum
11 pages * 2 spans ~ 0.2 MiB; 2160.7 MiB cum; unmapped: 0.2 MiB; 2160.7 MiB cum
16 pages * 2 spans ~ 0.2 MiB; 2161.0 MiB cum; unmapped: 0.2 MiB; 2161.0 MiB cum
17 pages * 2 spans ~ 0.3 MiB; 2161.2 MiB cum; unmapped: 0.3 MiB; 2161.2 MiB cum
22 pages * 1 spans ~ 0.2 MiB; 2161.4 MiB cum; unmapped: 0.2 MiB; 2161.4 MiB cum
24 pages * 2 spans ~ 0.4 MiB; 2161.8 MiB cum; unmapped: 0.4 MiB; 2161.8 MiB cum
32 pages * 13 spans ~ 3.2 MiB; 2165.0 MiB cum; unmapped: 3.2 MiB; 2165.0 MiB cum
33 pages * 26 spans ~ 6.7 MiB; 2171.7 MiB cum; unmapped: 6.7 MiB; 2171.7 MiB cum
34 pages * 12 spans ~ 3.2 MiB; 2174.9 MiB cum; unmapped: 3.2 MiB; 2174.9 MiB cum
35 pages * 16 spans ~ 4.4 MiB; 2179.3 MiB cum; unmapped: 4.4 MiB; 2179.3 MiB cum
36 pages * 15 spans ~ 4.2 MiB; 2183.5 MiB cum; unmapped: 4.2 MiB; 2183.5 MiB cum
37 pages * 6 spans ~ 1.7 MiB; 2185.2 MiB cum; unmapped: 1.7 MiB; 2185.2 MiB cum
38 pages * 7 spans ~ 2.1 MiB; 2187.3 MiB cum; unmapped: 2.1 MiB; 2187.3 MiB cum
39 pages * 17 spans ~ 5.2 MiB; 2192.5 MiB cum; unmapped: 5.2 MiB; 2192.5 MiB cum
40 pages * 28 spans ~ 8.8 MiB; 2201.2 MiB cum; unmapped: 8.8 MiB; 2201.2 MiB cum
41 pages * 11 spans ~ 3.5 MiB; 2204.8 MiB cum; unmapped: 3.5 MiB; 2204.8 MiB cum
42 pages * 10 spans ~ 3.3 MiB; 2208.1 MiB cum; unmapped: 3.3 MiB; 2208.1 MiB cum
43 pages * 10 spans ~ 3.4 MiB; 2211.4 MiB cum; unmapped: 3.4 MiB; 2211.4 MiB cum
44 pages * 15 spans ~ 5.2 MiB; 2216.6 MiB cum; unmapped: 5.2 MiB; 2216.6 MiB cum
45 pages * 8 spans ~ 2.8 MiB; 2219.4 MiB cum; unmapped: 2.8 MiB; 2219.4 MiB cum
46 pages * 15 spans ~ 5.4 MiB; 2224.8 MiB cum; unmapped: 5.4 MiB; 2224.8 MiB cum
47 pages * 11 spans ~ 4.0 MiB; 2228.8 MiB cum; unmapped: 4.0 MiB; 2228.8 MiB cum
48 pages * 17 spans ~ 6.4 MiB; 2235.2 MiB cum; unmapped: 6.4 MiB; 2235.2 MiB cum
49 pages * 9 spans ~ 3.4 MiB; 2238.6 MiB cum; unmapped: 3.4 MiB; 2238.6 MiB cum
50 pages * 11 spans ~ 4.3 MiB; 2242.9 MiB cum; unmapped: 4.3 MiB; 2242.9 MiB cum
51 pages * 9 spans ~ 3.6 MiB; 2246.5 MiB cum; unmapped: 3.6 MiB; 2246.5 MiB cum
52 pages * 13 spans ~ 5.3 MiB; 2251.8 MiB cum; unmapped: 5.3 MiB; 2251.8 MiB cum
53 pages * 8 spans ~ 3.3 MiB; 2255.1 MiB cum; unmapped: 3.3 MiB; 2255.1 MiB cum
54 pages * 9 spans ~ 3.8 MiB; 2258.9 MiB cum; unmapped: 3.8 MiB; 2258.9 MiB cum
55 pages * 6 spans ~ 2.6 MiB; 2261.5 MiB cum; unmapped: 2.6 MiB; 2261.5 MiB cum
56 pages * 14 spans ~ 6.1 MiB; 2267.6 MiB cum; unmapped: 6.1 MiB; 2267.6 MiB cum
57 pages * 9 spans ~ 4.0 MiB; 2271.6 MiB cum; unmapped: 4.0 MiB; 2271.6 MiB cum
58 pages * 15 spans ~ 6.8 MiB; 2278.4 MiB cum; unmapped: 6.8 MiB; 2278.4 MiB cum
59 pages * 8 spans ~ 3.7 MiB; 2282.1 MiB cum; unmapped: 3.7 MiB; 2282.1 MiB cum
60 pages * 14 spans ~ 6.6 MiB; 2288.7 MiB cum; unmapped: 6.6 MiB; 2288.7 MiB cum
61 pages * 5 spans ~ 2.4 MiB; 2291.0 MiB cum; unmapped: 2.4 MiB; 2291.0 MiB cum
62 pages * 6 spans ~ 2.9 MiB; 2294.0 MiB cum; unmapped: 2.9 MiB; 2294.0 MiB cum
63 pages * 7 spans ~ 3.4 MiB; 2297.4 MiB cum; unmapped: 3.4 MiB; 2297.4 MiB cum
64 pages * 22 spans ~ 11.0 MiB; 2308.4 MiB cum; unmapped: 11.0 MiB; 2308.4 MiB cum
65 pages * 8 spans ~ 4.1 MiB; 2312.5 MiB cum; unmapped: 4.1 MiB; 2312.5 MiB cum
66 pages * 5 spans ~ 2.6 MiB; 2315.0 MiB cum; unmapped: 2.6 MiB; 2315.0 MiB cum
67 pages * 11 spans ~ 5.8 MiB; 2320.8 MiB cum; unmapped: 5.8 MiB; 2320.8 MiB cum
68 pages * 8 spans ~ 4.2 MiB; 2325.0 MiB cum; unmapped: 4.2 MiB; 2325.0 MiB cum
69 pages * 4 spans ~ 2.2 MiB; 2327.2 MiB cum; unmapped: 2.2 MiB; 2327.2 MiB cum
70 pages * 8 spans ~ 4.4 MiB; 2331.6 MiB cum; unmapped: 4.4 MiB; 2331.6 MiB cum
71 pages * 12 spans ~ 6.7 MiB; 2338.2 MiB cum; unmapped: 6.7 MiB; 2338.2 MiB cum
72 pages * 15 spans ~ 8.4 MiB; 2346.7 MiB cum; unmapped: 8.4 MiB; 2346.7 MiB cum
73 pages * 9 spans ~ 5.1 MiB; 2351.8 MiB cum; unmapped: 5.1 MiB; 2351.8 MiB cum
74 pages * 9 spans ~ 5.2 MiB; 2357.0 MiB cum; unmapped: 5.2 MiB; 2357.0 MiB cum
75 pages * 3 spans ~ 1.8 MiB; 2358.8 MiB cum; unmapped: 1.8 MiB; 2358.8 MiB cum
76 pages * 6 spans ~ 3.6 MiB; 2362.3 MiB cum; unmapped: 3.6 MiB; 2362.3 MiB cum
77 pages * 3 spans ~ 1.8 MiB; 2364.1 MiB cum; unmapped: 1.8 MiB; 2364.1 MiB cum
78 pages * 7 spans ~ 4.3 MiB; 2368.4 MiB cum; unmapped: 4.3 MiB; 2368.4 MiB cum
79 pages * 7 spans ~ 4.3 MiB; 2372.7 MiB cum; unmapped: 4.3 MiB; 2372.7 MiB cum
80 pages * 5 spans ~ 3.1 MiB; 2375.8 MiB cum; unmapped: 3.1 MiB; 2375.8 MiB cum
81 pages * 2 spans ~ 1.3 MiB; 2377.1 MiB cum; unmapped: 1.3 MiB; 2377.1 MiB cum
82 pages * 4 spans ~ 2.6 MiB; 2379.7 MiB cum; unmapped: 2.6 MiB; 2379.7 MiB cum
83 pages * 4 spans ~ 2.6 MiB; 2382.3 MiB cum; unmapped: 2.6 MiB; 2382.3 MiB cum
84 pages * 1 spans ~ 0.7 MiB; 2382.9 MiB cum; unmapped: 0.7 MiB; 2382.9 MiB cum
85 pages * 2 spans ~ 1.3 MiB; 2384.2 MiB cum; unmapped: 1.3 MiB; 2384.2 MiB cum
86 pages * 4 spans ~ 2.7 MiB; 2386.9 MiB cum; unmapped: 2.7 MiB; 2386.9 MiB cum
87 pages * 2 spans ~ 1.4 MiB; 2388.3 MiB cum; unmapped: 1.4 MiB; 2388.3 MiB cum
88 pages * 5 spans ~ 3.4 MiB; 2391.7 MiB cum; unmapped: 3.4 MiB; 2391.7 MiB cum
89 pages * 3 spans ~ 2.1 MiB; 2393.8 MiB cum; unmapped: 2.1 MiB; 2393.8 MiB cum
90 pages * 7 spans ~ 4.9 MiB; 2398.7 MiB cum; unmapped: 4.9 MiB; 2398.7 MiB cum
92 pages * 6 spans ~ 4.3 MiB; 2403.1 MiB cum; unmapped: 4.3 MiB; 2403.1 MiB cum
93 pages * 4 spans ~ 2.9 MiB; 2406.0 MiB cum; unmapped: 2.9 MiB; 2406.0 MiB cum
94 pages * 1 spans ~ 0.7 MiB; 2406.7 MiB cum; unmapped: 0.7 MiB; 2406.7 MiB cum
95 pages * 4 spans ~ 3.0 MiB; 2409.7 MiB cum; unmapped: 3.0 MiB; 2409.7 MiB cum
96 pages * 2 spans ~ 1.5 MiB; 2411.2 MiB cum; unmapped: 1.5 MiB; 2411.2 MiB cum
97 pages * 3 spans ~ 2.3 MiB; 2413.4 MiB cum; unmapped: 2.3 MiB; 2413.4 MiB cum
98 pages * 10 spans ~ 7.7 MiB; 2421.1 MiB cum; unmapped: 7.7 MiB; 2421.1 MiB cum
99 pages * 3 spans ~ 2.3 MiB; 2423.4 MiB cum; unmapped: 2.3 MiB; 2423.4 MiB cum
101 pages * 3 spans ~ 2.4 MiB; 2425.8 MiB cum; unmapped: 2.4 MiB; 2425.8 MiB cum
102 pages * 4 spans ~ 3.2 MiB; 2429.0 MiB cum; unmapped: 3.2 MiB; 2429.0 MiB cum
103 pages * 2 spans ~ 1.6 MiB; 2430.6 MiB cum; unmapped: 1.6 MiB; 2430.6 MiB cum
104 pages * 2 spans ~ 1.6 MiB; 2432.2 MiB cum; unmapped: 1.6 MiB; 2432.2 MiB cum
106 pages * 2 spans ~ 1.7 MiB; 2433.9 MiB cum; unmapped: 1.7 MiB; 2433.9 MiB cum
108 pages * 3 spans ~ 2.5 MiB; 2436.4 MiB cum; unmapped: 2.5 MiB; 2436.4 MiB cum
109 pages * 7 spans ~ 6.0 MiB; 2442.4 MiB cum; unmapped: 6.0 MiB; 2442.4 MiB cum
111 pages * 8 spans ~ 6.9 MiB; 2449.3 MiB cum; unmapped: 6.9 MiB; 2449.3 MiB cum
112 pages * 4 spans ~ 3.5 MiB; 2452.8 MiB cum; unmapped: 3.5 MiB; 2452.8 MiB cum
113 pages * 1 spans ~ 0.9 MiB; 2453.7 MiB cum; unmapped: 0.9 MiB; 2453.7 MiB cum
114 pages * 2 spans ~ 1.8 MiB; 2455.5 MiB cum; unmapped: 1.8 MiB; 2455.5 MiB cum
115 pages * 2 spans ~ 1.8 MiB; 2457.2 MiB cum; unmapped: 1.8 MiB; 2457.2 MiB cum
116 pages * 1 spans ~ 0.9 MiB; 2458.2 MiB cum; unmapped: 0.9 MiB; 2458.2 MiB cum
117 pages * 1 spans ~ 0.9 MiB; 2459.1 MiB cum; unmapped: 0.9 MiB; 2459.1 MiB cum
118 pages * 2 spans ~ 1.8 MiB; 2460.9 MiB cum; unmapped: 1.8 MiB; 2460.9 MiB cum
119 pages * 1 spans ~ 0.9 MiB; 2461.8 MiB cum; unmapped: 0.9 MiB; 2461.8 MiB cum
120 pages * 3 spans ~ 2.8 MiB; 2464.7 MiB cum; unmapped: 2.8 MiB; 2464.7 MiB cum
121 pages * 1 spans ~ 0.9 MiB; 2465.6 MiB cum; unmapped: 0.9 MiB; 2465.6 MiB cum
122 pages * 2 spans ~ 1.9 MiB; 2467.5 MiB cum; unmapped: 1.9 MiB; 2467.5 MiB cum
123 pages * 9 spans ~ 8.6 MiB; 2476.2 MiB cum; unmapped: 8.6 MiB; 2476.2 MiB cum
124 pages * 8 spans ~ 7.8 MiB; 2483.9 MiB cum; unmapped: 7.8 MiB; 2483.9 MiB cum
125 pages * 3 spans ~ 2.9 MiB; 2486.8 MiB cum; unmapped: 2.9 MiB; 2486.8 MiB cum
127 pages * 14 spans ~ 13.9 MiB; 2500.7 MiB cum; unmapped: 13.9 MiB; 2500.7 MiB cum
>255 large * 211 spans ~ 969.4 MiB; 3470.1 MiB cum; unmapped: 969.4 MiB; 3470.1 MiB cum
