MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/29/00 through 08/04/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 38,536 1,853,877
MED90 8,436 178,397
MED85 6,086 63,754
MED80 5,232 29,783
MED75 4,811 22,095
MED66 4,819 18,758
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,660 46,087
2-4 a.m. 327 13,112
4-6 a.m. 153 5,767
6-8 a.m. 994 26,751
8-10 a.m. 5,214 163,695
10-12 a.m. 12,108 386,654
12-2 p.m. 13,099 383,954
2-4 p.m. 14,203 442,269
4-6 p.m. 11,397 380,055
6-8 p.m. 4,762 145,659
8-10 p.m. 2,494 101,732
10-12 p.m. 1,509 70,929
__________ _____________ _________________
Total: 67,920 2,166,664
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 380
Davis 700
Irvine 155
Los Angeles 461
Riverside 17
San Diego 690
San Francisco 1,447
Santa Barbara 4
Santa Cruz 57
Lawrence Berkeley 36
Lawrence Livermore 28
Los Alamos 0
MELWEB 58,104
Searchlight 5,384
Other - UC 89
Other-Network UC 368
_____
67,920
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,325
Davis 6,523
Irvine 1,678
Los Angeles 5,209
Riverside 40
San Diego 3,654
San Francisco 12,424
Santa Barbara 4
Santa Cruz 709
Lawrence Berkeley 226
Lawrence Livermore 121
Los Alamos 0
MELWEB 2,090,944
Searchlight 34,575
Other - UC 1,181
Other-Network UC 5,051
_____
2,166,664
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
Standard deviation in seconds 2.3
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:27
Average session length (minutes:seconds) 19:31
Longest session recorded (minutes:seconds) 296:32
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 510.5
Retrievals per search - standard deviation 5992.2
Percent of searches completed with 0 results 32.8%
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 67,920 13.9%
PRESENT 392,177 80.1%
INIT or CLOSE 28,876 5.9%
OTHER 364 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 4,861 5.0% 1,890 38.9% 4 700.8 3257.9
PERSONAL AUTHOR 21,996 22.7% 6,026 27.4% 6 90.0 1264.0
TITLE WORD 8,034 8.3% 3,075 38.3% 2 129.4 1444.4
SUBSET 174 0.2% 40 23.0% 27 151.5 392.8
SUBJECT WORD 299 0.3% 132 44.1% 10 1061.4 8800.3
SUBJECT 1,955 2.0% 935 47.8% 14 647.4 4321.1
EXACT SUBJECT 3,755 3.9% 989 26.3% 24 468.2 4361.7
MAJOR SUBJECT 216 0.2% 89 41.2% 9 77.0 176.2
EXACT MAJOR SUBJ 354 0.4% 61 17.2% 18 162.2 490.6
EXACT TITLE 633 0.7% 319 50.4% 1 29.1 339.8
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,541 1.6% 601 39.0% 339 1494.0 3130.6
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 6 0.0% 0 0.0% 32 91.7 124.8
KEYWORD 37,668 38.8% 12,921 34.3% 16 1138.4 9679.4
DATE 1,772 1.8% 421 23.8% 4 98.6 528.9
LANGUAGE 5,241 5.4% 1,608 30.7% 21 318.2 3486.8
UNIQUE ID 289 0.3% 26 9.0% 1 1.1 0.4
ADDED 1,306 1.3% 741 56.7% 4 11.8 20.5
PUB TYPE 2,490 2.6% 702 28.2% 19 116.1 452.9
AUTHOR AFFIL. 604 0.6% 278 46.0% 9 102.0 944.1
CHEMICAL NAME 6 0.0% 5 83.3% 8 8.0 0.0
EXACT CHEMICAL 3 0.0% 3 100% 0 0.0 0.0
AT 3,364 3.5% 1,183 35.2% 19 524.9 4810.4
AGE 134 0.1% 42 31.3% 38 278.7 982.5
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 99 0.1% 51 51.5% 120 337.9 983.3
XXS 164 0.2% 65 39.6% 12 334.8 1689.2
XMXS 85 0.1% 35 41.2% 13 120.8 365.2
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 14 0.0% 12 85.7% 1,784 1783.5 1849.1
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 19,727 29.0% 6,809 34.5% 6 183.8 2422.6
Single 48,193 71.0% 15,443 32.0% 16 986.2 8468.0
PRESENT commands, by type:
MARC 32.4%
OPAC 30.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS