【发布时间】：2019-12-14 05:09:41
【问题描述】：
我在 Cassandra 3.11.4 debug.log 上遇到如下错误。
可能是什么原因？如何避免这些错误。？？
我可以看到分区大小是 1.9 MB。堆大小 16GB。
================
free -m
total used free shared buff/cache available
Mem: 64264 23748 3279 619 37236 33190
Swap: 0 0 0
=========================
lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 16
On-line CPU(s) list: 0-15
Thread(s) per core: 1
Core(s) per socket: 1
Socket(s): 16
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 85
Model name: Intel(R) Xeon(R) Gold 6148 CPU @ 2.40GHz
Stepping: 4
CPU MHz: 2394.482
BogoMIPS: 4788.96
Virtualization: VT-x
Hypervisor vendor: KVM
Virtualization type: full
L1d cache: 32K
L1i cache: 32K
L2 cache: 1024K
L3 cache: 28160K
NUMA node0 CPU(s): 0-15
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good nopl eagerfpu pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f rdseed adx smap clflushopt clwb avx512cd xsaveopt xsavec xgetbv1 arat
nodetool tablestats test_data.local_data -H
Total number of tables: 37
----------------
Keyspace : test_data
Read Count: 0
Read Latency: NaN ms
Write Count: 48776898
Write Latency: 1.534334614042082 ms
Pending Flushes: 2
Table: local_data
SSTable count: 84
Space used (live): 115.53 GiB
Space used (total): 115.53 GiB
Space used by snapshots (total): 165.45 KiB
Off heap memory used (total): 216.71 MiB
SSTable Compression Ratio: 0.5440445152549487
Number of partitions (estimate): 139647
Memtable cell count: 1495900
Memtable data size: 167.87 MiB
Memtable off heap memory used: 174.38 MiB
Memtable switch count: 2016
Local read count: 0
Local read latency: NaN ms
Local write count: 48777246
Local write latency: 1.580 ms
Pending flushes: 2
Percent repaired: 0.0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used: 287.65 KiB
Bloom filter off heap memory used: 431.88 KiB
Index summary off heap memory used: 160.4 KiB
Compression metadata off heap memory used: 41.75 MiB
Compacted partition minimum bytes: 3974
Compacted partition maximum bytes: 1955666
Compacted partition mean bytes: 1109275
Average live cells per slice (last five minutes): NaN
Maximum live cells per slice (last five minutes): 0
Average tombstones per slice (last five minutes): NaN
Maximum tombstones per slice (last five minutes): 0
Dropped Mutations: 6 bytes
=========================================
nodetool tablehistograms test_data local_data
test_data/local_data histograms
Percentile SSTables Write Latency Read Latency Partition Size Cell Count
(micros) (micros) (bytes)
50% 0.00 315.85 0.00 1358102 61214
75% 0.00 943.13 0.00 1955666 152321
95% 0.00 2816.16 0.00 1955666 152321
98% 0.00 8409.01 0.00 1955666 152321
99% 0.00 36157.19 0.00 1955666 152321
Min 0.00 73.46 0.00 3974 373
Max 0.00 557074.61 0.00 1955666 152321
======================================
nodetool info
ID : 2985f5ef-5b84-4654-91f6-dc459741e9fc
Gossip active : true
Thrift active : false
Native Transport active: true
Load : 117.25 GiB
Generation No : 1576230314
Uptime (seconds) : 15745
Heap Memory (MB) : 8040.00 / 16384.00
Off Heap Memory (MB) : 287.19
Data Center : dc1
Rack : rack1
Exceptions : 0
Key Cache : entries 36568, size 66.79 MiB, capacity 100 MiB, 26555 hits, 63045 requests, 0.421 recent hit rate, 14400 save period in seconds
Row Cache : entries 0, size 0 bytes, capacity 0 bytes, 0 hits, 0 requests, NaN recent hit rate, 0 save period in seconds
Counter Cache : entries 0, size 0 bytes, capacity 50 MiB, 0 hits, 0 requests, NaN recent hit rate, 7200 save period in seconds
Chunk Cache : entries 65024, size 3.97 GiB, capacity 3.97 GiB, 12839660 misses, 15296535 requests, 0.161 recent hit rate, 468.900 microseconds miss latency
Percent Repaired : 1.8637552068836277E-7%
Token : (invoke with -T/--tokens to see all 256 tokens)
===================================
nodetool netstats
Mode: NORMAL
Not sending any streams.
Read Repair Statistics:
Attempted: 0
Mismatch (Blocking): 0
Mismatch (Background): 0
Pool Name Active Pending Completed Dropped
Large messages n/a 2 0 2
Small messages n/a 0 66196004 4
Gossip messages n/a 0 54691 30
===========================
INFO [CompactionExecutor:8] 2019-12-13 17:49:53,408 NoSpamLogger.java:91 - Maximum memory usage reached (4294967296), cannot allocate chunk of 1048576
INFO [CompactionExecutor:9] 2019-12-13 18:04:55,683 NoSpamLogger.java:91 - Maximum memory usage reached (4294967296), cannot allocate chunk of 1048576
INFO [CompactionExecutor:6] 2019-12-13 18:21:39,420 NoSpamLogger.java:91 - Maximum memory usage reached (4294967296), cannot allocate chunk of 1048576
INFO [CompactionExecutor:8] 2019-12-13 18:36:45,011 NoSpamLogger.java:91 - Maximum memory usage reached (4294967296), cannot allocate chunk of 1048576
INFO [CompactionExecutor:9] 2019-12-13 18:51:53,479 NoSpamLogger.java:91 - Maximum memory usage reached (4294967296), cannot allocate chunk of 1048576
INFO [CompactionExecutor:7] 2019-12-13 19:06:55,898 NoSpamLogger.java:91 - Maximum memory usage reached (4294967296), cannot allocate chunk of 1048576
【问题讨论】：
-
您可以使用
free命令的输出来编辑您的答案吗？ -
free -m total used free shared buff/cache available Mem: 64264 23748 3279 619 37236 33190 Swap: 0 0 0 ================= ===========
-
你好 sateesh，欢迎来到 SO。尝试编辑您的问题添加更多详细信息，而不是将它们放入 cmets：这些不是为此目的，通常不会在其中找到有用的信息。
标签： cassandra