MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 10/14/00 through 10/20/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 48,357 2,560,050
MED90 10,461 166,406
MED85 7,924 57,630
MED80 7,099 31,841
MED75 6,702 21,000
MED66 6,904 18,492
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,503 62,372
2-4 a.m. 315 9,193
4-6 a.m. 343 13,911
6-8 a.m. 1,053 47,228
8-10 a.m. 6,217 219,260
10-12 a.m. 14,997 471,736
12-2 p.m. 15,548 521,412
2-4 p.m. 18,397 561,426
4-6 p.m. 13,998 455,703
6-8 p.m. 6,423 242,721
8-10 p.m. 4,614 152,621
10-12 p.m. 3,039 97,836
__________ _____________ _________________
Total: 87,447 2,855,419
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 293
Davis 625
Irvine 159
Los Angeles 351
Riverside 73
San Diego 552
San Francisco 1,035
Santa Barbara 1
Santa Cruz 13
Lawrence Berkeley 52
Lawrence Livermore 4
Los Alamos 0
MELWEB 68,906
Searchlight 14,808
Other - UC 164
Other-Network UC 411
_____
87,447
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,280
Davis 8,486
Irvine 6,141
Los Angeles 3,474
Riverside 509
San Diego 4,262
San Francisco 13,597
Santa Barbara 0
Santa Cruz 151
Lawrence Berkeley 949
Lawrence Livermore 5
Los Alamos 0
MELWEB 2,762,433
Searchlight 48,893
Other - UC 788
Other-Network UC 3,451
_____
2,855,419
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.9
Standard deviation in seconds 3.7
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:50
Average session length (minutes:seconds) 17:16
Longest session recorded (minutes:seconds) 224:48
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 523.0
Retrievals per search - standard deviation 7416.9
Percent of searches completed with 0 results 33.9%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 87,447 13.9%
PRESENT 498,397 79.5%
INIT or CLOSE 40,471 6.5%
OTHER 599 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 5,697 4.4% 2,290 40.2% 4 925.8 13224.6
PERSONAL AUTHOR 22,577 17.6% 6,485 28.7% 7 77.5 632.8
TITLE WORD 8,400 6.5% 3,250 38.7% 4 290.7 2794.4
SUBSET 310 0.2% 88 28.4% 24 181.2 748.2
SUBJECT WORD 173 0.1% 87 50.3% 8 4057.3 28272.9
SUBJECT 3,144 2.4% 1,660 52.8% 21 621.9 3832.1
EXACT SUBJECT 6,715 5.2% 1,631 24.3% 29 627.5 4037.3
MAJOR SUBJECT 296 0.2% 78 26.3% 13 631.0 3199.2
EXACT MAJOR SUBJ 608 0.5% 135 22.2% 19 310.5 937.0
EXACT TITLE 715 0.6% 420 58.7% 1 11.4 102.2
TREE NUMBER 2 0.0% 0 0.0% 66 66.0 0.0
EXACT JOURNAL 1,347 1.0% 435 32.3% 491 1820.3 3312.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 18 0.0% 12 66.7% 141 489.7 975.0
KEYWORD 54,743 42.6% 19,108 34.9% 17 1014.4 10572.5
DATE 1,864 1.5% 447 24.0% 7 182.7 1212.0
LANGUAGE 8,928 6.9% 2,486 27.8% 24 465.8 3455.1
UNIQUE ID 258 0.2% 39 15.1% 1 1.1 0.9
ADDED 1,217 0.9% 567 46.6% 4 12.9 22.5
PUB TYPE 3,527 2.7% 934 26.5% 21 185.3 2348.8
AUTHOR AFFIL. 704 0.5% 363 51.6% 8 51.8 387.2
CHEMICAL NAME 11 0.0% 7 63.6% 25 55.5 80.8
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 6,415 5.0% 2,045 31.9% 19 500.2 3095.5
AGE 304 0.2% 93 30.6% 25 147.5 427.7
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 175 0.1% 45 25.7% 28 290.2 982.2
XXS 203 0.2% 73 36.0% 14 3089.6 19449.3
XMXS 146 0.1% 58 39.7% 27 141.9 359.4
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 36 0.0% 21 58.3% 2 444.6 1150.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 26,416 30.2% 8,860 33.5% 9 353.5 2971.6
Single 61,031 69.8% 20,789 34.1% 17 982.2 10736.1
PRESENT commands, by type:
MARC 30.5%
OPAC 30.2%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS