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docs: updated scaling/cluster docs
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@@ -8,7 +8,7 b' the information in the following section'
8 8
9 9 .. toctree::
10 10
11 apache-conf-example
11 12 apache-diffie-hellman
12 apache-conf-example
13 13 apache-subdirectory
14 14 apache-wsgi-coding
@@ -7,7 +7,7 b' Use the following example to configure N'
7 7 .. code-block:: nginx
8 8
9 9 ## rate limiter for certain pages to prevent brute force attacks
10 limit_req_zone $binary_remote_addr zone=dl_limit:10m rate=1r/s;
10 limit_req_zone $binary_remote_addr zone=req_limit:10m rate=1r/s;
11 11
12 12 ## custom log format
13 13 log_format log_custom '$remote_addr - $remote_user [$time_local] '
@@ -18,7 +18,7 b' Use the following example to configure N'
18 18 ## define upstream (local RhodeCode instance) to connect to
19 19 upstream rc {
20 20 # Url to running RhodeCode instance.
21 # This is shown as `- URL:` in output from rccontrol status.
21 # This is shown as `- URL: <host>` in output from rccontrol status.
22 22 server 127.0.0.1:10002;
23 23
24 24 # add more instances for load balancing
@@ -85,9 +85,10 b' Use the following example to configure N'
85 85 # Diffie-Hellman parameter for DHE ciphersuites, recommended 2048 bits
86 86 #ssl_dhparam /etc/nginx/ssl/dhparam.pem;
87 87
88 # example of proxy.conf can be found in our docs.
88 89 include /etc/nginx/proxy.conf;
89 90
90 ## serve static files by Nginx, recommended for performance
91 ## uncomment to serve static files by Nginx, recommended for performance
91 92 # location /_static/rhodecode {
92 93 # gzip on;
93 94 # gzip_min_length 500;
@@ -96,6 +97,7 b' Use the following example to configure N'
96 97 # gzip_types text/css text/javascript text/xml text/plain text/x-component application/javascript application/json application/xml application/rss+xml font/truetype font/opentype application/vnd.ms-fontobject image/svg+xml;
97 98 # gzip_vary on;
98 99 # gzip_disable "msie6";
100 # alias /path/to/.rccontrol/community-1/static;
99 101 # alias /path/to/.rccontrol/enterprise-1/static;
100 102 # }
101 103
@@ -120,9 +122,9 b' Use the following example to configure N'
120 122 proxy_set_header Connection "upgrade";
121 123 }
122 124
125 ## rate limit this endpoint to prevent login page brute-force attacks
123 126 location /_admin/login {
124 ## rate limit this endpoint
125 limit_req zone=dl_limit burst=10 nodelay;
127 limit_req zone=req_limit burst=10 nodelay;
126 128 try_files $uri @rhode;
127 129 }
128 130
@@ -138,6 +140,7 b' Use the following example to configure N'
138 140 ## is turned off
139 141 error_page 502 /502.html;
140 142 location = /502.html {
143 #root /path/to/.rccontrol/community-1/static;
141 144 root /path/to/.rccontrol/enterprise-1/static;
142 145 }
143 146 } No newline at end of file
@@ -8,7 +8,7 b' the information in the following section'
8 8
9 9 .. toctree::
10 10
11 nginx-config-example
11 12 nginx-diffie-hellman
12 nginx-config-example
13 nginx-tuning
13 nginx-proxy-conf
14 14 nginx-url-prefix
@@ -1,7 +1,8 b''
1 .. _nginx-tuning:
1 .. _nginx-proxy-conf:
2 2
3 Nginx Tuning
4 ------------
3 Nginx Proxy Config
4 ------------------
5
5 6
6 7 Set the following properties in your ``/etc/nginx/proxy.conf`` so it does not
7 8 timeout during large pushes.
@@ -1,7 +1,7 b''
1 1 .. _hg-lrg-loc:
2 2
3 Change the |hg| Large Files Location
4 ------------------------------------
3 |hg| Large Files Location
4 -------------------------
5 5
6 6 |RCE| manages |hg| larges files from the following default location
7 7 :file:`/home/{user}/repos/.cache/largefiles`. If you wish to change this, use
@@ -1,7 +1,7 b''
1 1 .. _git-lfs-loc:
2 2
3 Change the |git| LFS storage Location
4 -------------------------------------
3 |git| LFS storage Location
4 --------------------------
5 5
6 6 |RCE| manages |git| LFS files from the following default location
7 7 :file:`/home/{user}/repos/.cache/lfs_store`. If you wish to change this, use
@@ -1,14 +1,13 b''
1 1 .. _increase-gunicorn:
2 2
3 Increase Gunicorn Workers
4 -------------------------
3 Configure Gunicorn Workers
4 --------------------------
5 5
6 6
7 |RCE| comes with `Gunicorn`_ packaged in its Nix environment.
8 Gunicorn is a Python WSGI HTTP Server for UNIX.
7 |RCE| comes with `Gunicorn`_ which is a Python WSGI HTTP Server for UNIX.
9 8
10 9 To improve |RCE| performance you can increase the number of `Gunicorn`_ workers.
11 This allows to handle more connections concurently, and provide better
10 This allows to handle more connections concurrently, and provide better
12 11 responsiveness and performance.
13 12
14 13 By default during installation |RCC| tries to detect how many CPUs are
@@ -18,8 +17,11 b" However sometimes it's better to manuall"
18 17 To do this, use the following steps:
19 18
20 19 1. Open the :file:`home/{user}/.rccontrol/{instance-id}/rhodecode.ini` file.
21 2. In the ``[server:main]`` section, increase the number of Gunicorn
22 ``workers`` using the following formula :math:`(2 * Cores) + 1`.
20 2. In the ``[server:main]`` section, change the number of Gunicorn
21 ``workers`` using the following default formula :math:`(2 * Cores) + 1`.
22 We however not recommend using more than 8-12 workers per server. It's better
23 to start using the :ref:`scale-horizontal-cluster` in case that performance
24 with 8-12 workers is not enough.
23 25
24 26 .. code-block:: ini
25 27
@@ -1,7 +1,7 b''
1 1 .. _db-session-ref:
2 2
3 Increase Database Performance
4 -----------------------------
3 Database Performance
4 --------------------
5 5
6 6 For tuning PostgreSQL we recommend reading: http://www.revsys.com/writings/postgresql-performance.html
7 7
@@ -12,8 +12,7 b' may find some of the following methods u'
12 12 tuning-vcs-memory-cache
13 13 tuning-user-sessions-performance
14 14 tuning-increase-db-performance
15 tuning-scale-horizontally
16 tuning-increase-cache-size
15 tuning-scale-horizontally-cluster
17 16 tuning-mount-cache-memory
18 17 tuning-change-encoding
19 18 tuning-change-large-file-dir
@@ -1,58 +1,383 b''
1 .. _scale-horizontal:
1 .. _scale-horizontal-cluster:
2
2 3
3 Scale Horizontally
4 ------------------
4 Scale Horizontally / RhodeCode Cluster
5 --------------------------------------
5 6
6 7 |RCE| is built in a way it support horizontal scaling across multiple machines.
7 There are two main pre-requisites for that:
8 There are three main pre-requisites for that:
8 9
9 - Shared storage that each machine can access.
10 - Shared DB connection across machines.
10 - Shared storage that each machine can access. Using NFS or other shared storage system.
11 - Shared DB connection across machines. Using `MySQL`/`PostgreSQL` that each node can access.
12 - |RCE| user sessions and caches need to use a shared storage (e.g `Redis`_/`Memcached`)
11 13
12 14
13 15 Horizontal scaling means adding more machines or workers into your pool of
14 16 resources. Horizontally scaling |RCE| gives a huge performance increase,
15 especially under large traffic scenarios with a high number of requests. This
16 is very beneficial when |RCE| is serving many users simultaneously,
17 especially under large traffic scenarios with a high number of requests.
18 This is very beneficial when |RCE| is serving many users simultaneously,
17 19 or if continuous integration servers are automatically pulling and pushing code.
20 It also adds High-Availability to your running system.
21
22
23 Cluster Overview
24 ^^^^^^^^^^^^^^^^
25
26 Below we'll present a configuration example that will use two separate nodes to serve
27 |RCE| in a load-balanced environment. The 3rd node will act as a shared storage/cache
28 and handle load-balancing. In addition 3rd node will be used as shared database instance.
29
30 This setup can be used both in Docker based configuration or with individual
31 physical/virtual machines. Using the 3rd node for Storage/Redis/PostgreSQL/Nginx is
32 optional. All those components can be installed on one of the two nodes used for |RCE|.
33 We'll use following naming for our nodes:
34
35 - `rc-node-1` (NFS, DB, Cache node)
36 - `rc-node-2` (Worker node1)
37 - `rc-node-3` (Worker node2)
38
39 Our shares NFS storage in the example is located on `/home/rcdev/storage` and
40 it's RW accessible on **each** node.
41
42 In this example we used certain recommended components, however many
43 of those can be replaced by other, in case your organization already uses them, for example:
44
45 - `MySQL`/`PostgreSQL`: Aren't replaceable and are the two only supported databases.
46 - `Nginx`_ on `rc-node-1` can be replaced by: `Hardware Load Balancer (F5)`, `Apache`_, `HA-Proxy` etc.
47 - `Nginx`_ on rc-node-2/3 acts as a reverse proxy and can be replaced by other HTTP server
48 acting as reverse proxy such as `Apache`_.
49 - `Redis`_ on `rc-node-1` can be replaced by: `Memcached`
50
51
52 Here's an overview what components should be installed/setup on each server in our example:
53
54 - **rc-node-1**:
55
56 - main storage acting as NFS host.
57 - `nginx` acting as a load-balancer.
58 - `postgresql-server` used for database and sessions.
59 - `redis-server` used for storing shared caches.
60 - optionally `rabbitmq-server` for `Celery` if used.
61 - optionally if `Celery` is used Enterprise/Community instance + VCSServer.
62 - optionally mailserver that can be shared by other instances.
63 - optionally channelstream server to handle live communication for all instances.
64
65
66 - **rc-node-2/3**:
67
68 - `nginx` acting as a reverse proxy to handle requests to |RCE|.
69 - 1x RhodeCode Enterprise/Community instance.
70 - 1x VCSServer instance.
71 - optionally for testing connection: postgresql-client, redis-client (redis-tools).
72
73
74 Before we start here are few assumptions that should be fulfilled:
75
76 - make sure each node can access each other.
77 - make sure `Redis`_/`MySQL`/`PostgreSQL`/`RabbitMQ`_ are running on `rc-node-1`
78 - make sure both `rc-node-2`/`3` can access NFS storage with RW access
79 - make sure rc-node-2/3 can access `Redis`_/`PostgreSQL`, `MySQL` database on `rc-node-1`.
80 - make sure `Redis`_/Database/`RabbitMQ`_ are password protected and accessible only from rc-node-2/3.
81
18 82
19 83
20 If you scale across different machines, each |RCM| instance
21 needs to store its data on a shared disk, preferably together with your
22 |repos|. This data directory contains template caches, a full text search index,
23 and is used for task locking to ensure safety across multiple instances.
24 To do this, set the following properties in the :file:`rhodecode.ini` file to
25 set the shared location across all |RCM| instances.
84 Setup rc-node-2/3
85 ^^^^^^^^^^^^^^^^^
86
87 Initially before `rc-node-1` we'll configure both nodes 2 and 3 to operate as standalone
88 nodes with their own hostnames. Use a default installation settings, and use
89 the default local addresses (127.0.0.1) to configure VCSServer and Community/Enterprise instances.
90 All external connectivity will be handled by the reverse proxy (`Nginx`_ in our example).
91
92 This way we can ensure each individual host works,
93 accepts connections, or do some operations explicitly on chosen node.
94
95 In addition this would allow use to explicitly direct certain traffic to a node, e.g
96 CI server will only call directly `rc-node-3`. This should be done similar to normal
97 installation so check out `Nginx`_/`Apache`_ configuration example to configure each host.
98 Each one should already connect to shared database during installation.
99
100
101 1) Assuming our final url will be http://rc-node-1, Configure `instances_id`, `app.base_url`
102
103 a) On **rc-node-2** find the following settings and edit :file:`/home/{user}/.rccontrol/{instance-id}/rhodecode.ini`
104
105 .. code-block:: ini
106
107 ## required format is: *NAME-
108 instance_id = *rc-node-2-
109 app.base_url = http://rc-node-1
110
111
112 b) On **rc-node-3** find the following settings and edit :file:`/home/{user}/.rccontrol/{instance-id}/rhodecode.ini`
113
114 .. code-block:: ini
115
116 ## required format is: *NAME-
117 instance_id = *rc-node-3-
118 app.base_url = http://rc-node-1
119
120
121
122 2) Configure `User Session` to use a shared database. Example config that should be
123 changed on both node 2 and 3. Edit :file:`/home/{user}/.rccontrol/{instance-id}/rhodecode.ini`
124
125 .. code-block:: ini
126
127 ####################################
128 ### BEAKER SESSION ####
129 ####################################
130
131 ## Disable the default `file` sessions
132 #beaker.session.type = file
133 #beaker.session.data_dir = %(here)s/data/sessions
134
135 ## use shared db based session, fast, and allows easy management over logged in users
136 beaker.session.type = ext:database
137 beaker.session.table_name = db_session
138 # use our rc-node-1 here
139 beaker.session.sa.url = postgresql://postgres:qweqwe@rc-node-1/rhodecode
140 beaker.session.sa.pool_recycle = 3600
141 beaker.session.sa.echo = false
142
143 In addition make sure both instances use the same `session.secret` so users have
144 persistent sessions across nodes. Please generate other one then in this example.
145
146 .. code-block:: ini
147
148 # use an unique generated long string
149 beaker.session.secret = 70e116cae2274656ba7265fd860aebbd
150
151 3) Configure stored cached/archive cache to our shared NFS `rc-node-1`
26 152
27 153 .. code-block:: ini
28 154
29 cache_dir = /shared/path/caches # set to shared location
30 search.location = /shared/path/search_index # set to shared location
155 # note the `_` prefix that allows using a directory without
156 # remap and rescan checking for vcs inside it.
157 cache_dir = /home/rcdev/storage/_cache_dir/data
158 # note archive cache dir is disabled by default, however if you enable
159 # it also needs to be shared
160 #archive_cache_dir = /home/rcdev/storage/_tarball_cache_dir
161
162
163 4) Change cache backends to use `Redis`_ based caches. Below full example config
164 that replaces default file-based cache to shared `Redis`_ with Distributed Lock.
165
166
167 .. code-block:: ini
168
169 #####################################
170 ### DOGPILE CACHE ####
171 #####################################
172
173 ## `cache_perms` cache settings for permission tree, auth TTL.
174 #rc_cache.cache_perms.backend = dogpile.cache.rc.file_namespace
175 #rc_cache.cache_perms.expiration_time = 300
176
177 ## alternative `cache_perms` redis backend with distributed lock
178 rc_cache.cache_perms.backend = dogpile.cache.rc.redis
179 rc_cache.cache_perms.expiration_time = 300
180 ## redis_expiration_time needs to be greater then expiration_time
181 rc_cache.cache_perms.arguments.redis_expiration_time = 7200
182 rc_cache.cache_perms.arguments.socket_timeout = 30
183 rc_cache.cache_perms.arguments.host = rc-node-1
184 rc_cache.cache_perms.arguments.password = qweqwe
185 rc_cache.cache_perms.arguments.port = 6379
186 rc_cache.cache_perms.arguments.db = 0
187 rc_cache.cache_perms.arguments.distributed_lock = true
188
189 ## `cache_repo` cache settings for FileTree, Readme, RSS FEEDS
190 #rc_cache.cache_repo.backend = dogpile.cache.rc.file_namespace
191 #rc_cache.cache_repo.expiration_time = 2592000
192
193 ## alternative `cache_repo` redis backend with distributed lock
194 rc_cache.cache_repo.backend = dogpile.cache.rc.redis
195 rc_cache.cache_repo.expiration_time = 2592000
196 ## redis_expiration_time needs to be greater then expiration_time
197 rc_cache.cache_repo.arguments.redis_expiration_time = 2678400
198 rc_cache.cache_repo.arguments.socket_timeout = 30
199 rc_cache.cache_repo.arguments.host = rc-node-1
200 rc_cache.cache_repo.arguments.password = qweqwe
201 rc_cache.cache_repo.arguments.port = 6379
202 rc_cache.cache_repo.arguments.db = 1
203 rc_cache.cache_repo.arguments.distributed_lock = true
204
205 ## cache settings for SQL queries, this needs to use memory type backend
206 rc_cache.sql_cache_short.backend = dogpile.cache.rc.memory_lru
207 rc_cache.sql_cache_short.expiration_time = 30
208
209 ## `cache_repo_longterm` cache for repo object instances, this needs to use memory
210 ## type backend as the objects kept are not pickle serializable
211 rc_cache.cache_repo_longterm.backend = dogpile.cache.rc.memory_lru
212 ## by default we use 96H, this is using invalidation on push anyway
213 rc_cache.cache_repo_longterm.expiration_time = 345600
214 ## max items in LRU cache, reduce this number to save memory, and expire last used
215 ## cached objects
216 rc_cache.cache_repo_longterm.max_size = 10000
217
218
219 4) Configure `Nginx`_ as reverse proxy on `rc-node-2/3`:
220 Minimal `Nginx`_ config used:
221
31 222
32 ####################################
33 ### BEAKER CACHE ####
34 ####################################
35 beaker.cache.data_dir = /shared/path/data # set to shared location
36 beaker.cache.lock_dir = /shared/path/lock # set to shared location
223 .. code-block:: nginx
224
225 ## rate limiter for certain pages to prevent brute force attacks
226 limit_req_zone $binary_remote_addr zone=req_limit:10m rate=1r/s;
227
228 ## custom log format
229 log_format log_custom '$remote_addr - $remote_user [$time_local] '
230 '"$request" $status $body_bytes_sent '
231 '"$http_referer" "$http_user_agent" '
232 '$request_time $upstream_response_time $pipe';
233
234 server {
235 listen 80;
236 server_name rc-node-2;
237 #server_name rc-node-3;
238
239 access_log /var/log/nginx/rhodecode.access.log log_custom;
240 error_log /var/log/nginx/rhodecode.error.log;
241
242 # example of proxy.conf can be found in our docs.
243 include /etc/nginx/proxy.conf;
244
245 ## serve static files by Nginx, recommended for performance
246 location /_static/rhodecode {
247 gzip on;
248 gzip_min_length 500;
249 gzip_proxied any;
250 gzip_comp_level 4;
251 gzip_types text/css text/javascript text/xml text/plain text/x-component application/javascript application/json application/xml application/rss+xml font/truetype font/opentype application/vnd.ms-fontobject image/svg+xml;
252 gzip_vary on;
253 gzip_disable "msie6";
254 #alias /home/rcdev/.rccontrol/community-1/static;
255 alias /home/rcdev/.rccontrol/enterprise-1/static;
256 }
257
258
259 location /_admin/login {
260 limit_req zone=req_limit burst=10 nodelay;
261 try_files $uri @rhode;
262 }
263
264 location / {
265 try_files $uri @rhode;
266 }
267
268 location @rhode {
269 # Url to running RhodeCode instance.
270 # This is shown as `- URL: <host>` in output from rccontrol status.
271 proxy_pass http://127.0.0.1:10020;
272 }
273
274 ## custom 502 error page. Will be displayed while RhodeCode server
275 ## is turned off
276 error_page 502 /502.html;
277 location = /502.html {
278 #root /home/rcdev/.rccontrol/community-1/static;
279 root /home/rcdev/.rccontrol/enterprise-1/static;
280 }
281 }
282
283
284 5) Optional: Full text search, in case you use `Whoosh` full text search we also need a
285 shared storage for the index. In our example our NFS is mounted at `/home/rcdev/storage`
286 which represents out storage so we can use the following:
287
288 .. code-block:: ini
289
290 # note the `_` prefix that allows using a directory without
291 # remap and rescan checking for vcs inside it.
292 search.location = /home/rcdev/storage/_index_data/index
37 293
38 294
39 295 .. note::
40 296
41 If you use custom caches such as `beaker.cache.auth_plugins.` it's recommended
42 to set it to the memcached/redis or database backend so it can be shared
43 across machines.
297 If you use ElasticSearch it's by default shared, and simply running ES node is
298 by default cluster compatible.
299
300
301 6) Optional: If you intend to use mailing all instances need to use either a shared
302 mailing node, or each will use individual local mailagent. Simply put node-1/2/3 needs
303 to use same mailing configuration.
304
305
306
307 Setup rc-node-1
308 ^^^^^^^^^^^^^^^
44 309
45 310
46 It is recommended to create another dedicated |RCE| instance to handle
47 traffic from build farms or continuous integration servers.
311 Configure `Nginx`_ as Load Balancer to rc-node-2/3.
312 Minimal `Nginx`_ example below:
313
314 .. code-block:: nginx
315
316 ## define rc-cluster which contains a pool of our instances to connect to
317 upstream rc-cluster {
318 # rc-node-2/3 are stored in /etc/hosts with correct IP addresses
319 server rc-node-2:80;
320 server rc-node-3:80;
321 }
322
323 server {
324 listen 80;
325 server_name rc-node-1;
326
327 location / {
328 proxy_pass http://rc-cluster;
329 }
330 }
331
48 332
49 333 .. note::
50 334
51 335 You should configure your load balancing accordingly. We recommend writing
52 336 load balancing rules that will separate regular user traffic from
53 automated process traffic like continuous servers or build bots.
337 automated process traffic like continuous servers or build bots. Sticky sessions
338 are not required.
339
340
341 Show which instance handles a request
342 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
343
344 You can easily check if load-balancing is working as expected. Visit our main node
345 `rc-node-1` URL which at that point should already handle incoming requests and balance
346 it across node-2/3.
347
348 Add a special GET param `?showrcid=1` to show current instance handling your request.
349
350 For example: visiting url `http://rc-node-1/?showrcid=1` will show, in the bottom
351 of the screen` cluster instance info.
352 e.g: `RhodeCode instance id: rc-node-3-rc-node-3-3246`
353 which is generated from::
354
355 <NODE_HOSTNAME>-<INSTANCE_ID>-<WORKER_PID>
356
357
358 Using Celery with cluster
359 ^^^^^^^^^^^^^^^^^^^^^^^^^
54 360
55 .. note::
361
362 If `Celery` is used we recommend setting also an instance of Enterprise/Community+VCSserver
363 on the node that is running `RabbitMQ`_. Those instances will be used to executed async
364 tasks on the `rc-node-1`. This is the most efficient setup. `Celery` usually
365 handles tasks such as sending emails, forking repositories, importing
366 repositories from external location etc. Using workers on instance that has
367 the direct access to disks used by NFS as well as email server gives noticeable
368 performance boost. Running local workers to the NFS storage results in faster
369 execution of forking large repositories or sending lots of emails.
56 370
57 If Celery is used on each instance then you should run separate Celery
58 instances, but the message broker should be the same for all of them.
371 Those instances need to be configured in the same way as for other nodes.
372 The instance in rc-node-1 can be added to the cluser, but we don't recommend doing it.
373 For best results let it be isolated to only executing `Celery` tasks in the cluster setup.
374
375
376 .. _Gunicorn: http://gunicorn.org/
377 .. _Whoosh: https://pypi.python.org/pypi/Whoosh/
378 .. _Elasticsearch: https://www.elastic.co/..
379 .. _RabbitMQ: http://www.rabbitmq.com/
380 .. _Nginx: http://nginx.io
381 .. _Apache: http://nginx.io
382 .. _Redis: http://redis.io
383
@@ -1,7 +1,7 b''
1 1 .. _user-session-ref:
2 2
3 Increase User Session Performance
4 ---------------------------------
3 User Session Performance
4 ------------------------
5 5
6 6 The default file-based sessions are only suitable for smaller setups, or
7 7 instances that doesn't have a lot of users or traffic.
@@ -24,8 +24,9 b' your :file:`/home/{user}/.rccontrol/{ins'
24 24 beaker.session.type = ext:database
25 25 beaker.session.table_name = db_session
26 26
27 # use just one of the following accoring to the type of database
27 # use just one of the following according to the type of database
28 28 beaker.session.sa.url = postgresql://postgres:secret@localhost/rhodecode
29 # or
29 30 beaker.session.sa.url = mysql://root:secret@127.0.0.1/rhodecode
30 31
31 32 beaker.session.sa.pool_recycle = 3600
@@ -1,7 +1,7 b''
1 1 .. _adjust-vcs-mem-cache:
2 2
3 Adjusting VCS Memory Cache
4 --------------------------
3 VCSServer Memory Cache
4 ----------------------
5 5
6 6 The VCS Server mamory cache can be adjusted to work best with the resources
7 7 available to your |RCE| instance. If you find that memory resources are under
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